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취약점

Weak Encryption: User-Controlled Key Size

Abstract
키 크기 매개 변수를 사용하는 암호화 함수에는 감염된 키 크기 값을 전달해서는 안 됩니다.
Explanation
사용자가 제어하는 값을 통해 키 크기를 결정할 수 있도록 허용하면 공격자가 빈 키를 지정하여 빈 키로 암호화된 데이터를 비교적 손쉽게 해독할 수 있게 됩니다. 0이 아닌 값을 지정해야 하더라도 공격자는 여전히 최대한 낮은 값을 지정하여 암호화의 보안 수준을 떨어뜨릴 수 있습니다.

약한 암호화: 사용자 제어 키 크기 문제는 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스를 통해 데이터가 프로그램에 입력됩니다.

2. 암호화 함수 내에서 사용자 제어 데이터가 키 크기 매개 변수 내에 포함되거나 전체 키 크기 매개 변수로 사용됩니다.

여러 소프트웨어 보안 취약점과 마찬가지로 약한 암호화: 사용자 제어 키 크기는 목적의 수단일 뿐 목적 자체는 아닙니다. 이 취약점은 본질적으로 간단 명료합니다. 즉, 공격자가 응용 프로그램에 악성 데이터를 전달하며 이 데이터가 암호화를 수행하는 동안 키 크기 값의 전체 또는 일부로 사용됩니다.

사용자 제어 키 크기가 있을 때의 문제는 다양한 공격이 가능해질 수 있다는 점입니다.

1. 공격자는 이 취약점을 이용하여 자신이 접근할 수 있는 데이터와 관련된 암호화 작업에 대해 키 크기를 0으로 지정할 수 있습니다. 이렇게 되면 여러 알고리즘을 빈 키와 함께 사용하여 자신의 데이터를 해독할 수 있기 때문에 응용 프로그램 내에서 사용되는 암호화 구현에 대한 정보가 누출될 수 있습니다. 이에 따라 공격자가 크랙하는 동안 특정 알고리즘에 집중할 수 있도록 하여 다른 사용자의 암호화된 데이터를 보다 쉽게 해독하게 될 수 있습니다.
2. 공격자가 다른 사용자의 암호화 키 크기를 조작할 수 있거나 다른 사용자가 0(또는 최대한 낮은 값)인 암호화 키 크기를 사용하도록 속일 수 있다면, 공격자가 사용된 암호화 알고리즘을 파악한 후 다른 사용자의 암호화된 데이터를 판독할 수 있게 됩니다.

예제 1: 다음 코드에서는 사용자 제어 키 크기 매개 변수를 사용하여 RSA 암호화를 수행합니다.

    ...
    RSACryptoServiceProvider rsa1 = new RSACryptoServiceProvider(Convert.ToInt32(tx.Text));
    ...
Example 1의 코드는 성공적으로 실행되지만 이 기능을 사용할 수 있는 사용자라면 누구나 tx.Text 텍스트 상자 값을 수정하여 암호화 알고리즘에 대한 키 크기 매개 변수를 조작할 수 있습니다. 프로그램을 공개한 후에는 악의적인 사용자가 지정된 암호화 작업의 키 크기를 알아내었는지 여부를 파악하기가 상당히 어렵기 때문에 사용자 제어 키 크기와 관련된 문제를 되돌리기가 힘들 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 326
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002450
[3] Standards Mapping - FIPS200 MP
[4] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[9] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[11] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[14] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[15] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[16] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
desc.dataflow.dotnet.weak_encryption_user_controlled_key_size
Abstract
키 크기를 사용하는 암호화 함수는 감염된 키 크기 값을 수신할 수 있습니다.
Explanation
사용자가 제어하는 값을 통해 키 크기를 결정할 수 있도록 허용하면 공격자가 빈 키를 지정하여 빈 키로 암호화된 데이터를 비교적 손쉽게 해독할 수 있게 됩니다. 0이 아닌 값을 지정해야 하더라도 공격자는 여전히 최대한 낮은 값을 지정하여 암호화의 보안 수준을 떨어뜨릴 수 있습니다.

약한 암호화: 사용자 제어 키 크기 이슈는 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스를 통해 데이터가 프로그램에 입력됩니다.

2. 암호화 함수 내에서 사용자 제어 데이터가 키 크기 매개 변수 내에 포함되거나 전체 키 크기 매개 변수로 사용됩니다.

다수의 소프트웨어 보안 취약점과 마찬가지로 약한 암호화: 사용자 제어 키 크기는 목적 달성을 위한 수단이며 그 자체가 목적은 아닙니다. 이 취약점은 본질적으로 간단 명료합니다. 즉, 공격자가 응용 프로그램에 악성 데이터를 전달하며 데이터가 키 크기 값의 전체 또는 일부로 사용되어 암호화가 수행됩니다.

사용자 제어 키 크기가 있을 때의 문제는 다양한 공격이 가능해질 수 있다는 점입니다.

1. 공격자는 이 취약점을 이용하여 자신이 접근할 수 있는 데이터와 관련된 암호화 작업에 대해 키 크기를 0으로 지정할 수 있습니다. 이렇게 되면 여러 알고리즘을 빈 키와 함께 사용하여 자신의 데이터를 해독할 수 있기 때문에 응용 프로그램 내에서 사용되는 암호화 구현 정보가 누출될 수 있습니다. 이에 따라 공격자가 크랙하는 동안 특정 알고리즘에만 집중할 수 있도록 하여 다른 사용자의 암호화된 데이터를 보다 쉽게 해독하게 될 수 있습니다.
2. 공격자가 다른 사용자의 암호화 키 크기를 조작할 수 있거나 다른 사용자가 0이나 다른 낮은 숫자인 암호화 키 크기를 사용하도록 속일 수 있다면, 공격자가 사용된 암호화 알고리즘을 파악한 후 다른 사용자의 암호화된 데이터를 판독할 수 있게 됩니다.

예제 1: 다음 코드에서는 사용자가 제어하는 파생된 키 길이를 사용하여 RSA 키를 생성합니다.

...
rsa.GenerateKey(random, user_input)
...
Example 1의 코드는 성공적으로 실행되지만 user_input 변수는 사용자가 제어할 수 있으므로 이 기능을 사용할 수 있는 사용자는 누구든지 암호화 알고리즘에 대해 키 크기 매개 변수를 조작할 수 있습니다. 소프트웨어 릴리스 후에는 사용자 제어 키 크기와 관련된 이슈를 해결하기가 힘들 수 있습니다. 악의적인 사용자가 지정된 암호화 작업의 키 크기를 알아내었는지 여부를 파악하기가 상당히 어렵기 때문입니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 326
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002450
[3] Standards Mapping - FIPS200 MP
[4] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[9] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[11] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[14] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[15] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[16] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
desc.dataflow.golang.weak_encryption_user_controlled_key_size
Abstract
키 크기 매개 변수를 사용하는 암호화 함수에는 감염된 키 크기 값을 전달해서는 안 됩니다.
Explanation
사용자가 제어하는 값을 통해 키 크기를 결정할 수 있도록 허용하면 공격자가 빈 키를 지정하여 빈 키로 암호화된 데이터를 비교적 손쉽게 해독할 수 있게 됩니다. 0이 아닌 값을 지정해야 하더라도 공격자는 여전히 최대한 낮은 값을 지정하여 암호화의 보안 수준을 떨어뜨릴 수 있습니다.

약한 암호화: 사용자 제어 키 크기 이슈는 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스를 통해 데이터가 프로그램에 입력됩니다.

2. 암호화 함수 내에서 사용자 제어 데이터가 키 크기 매개 변수 내에 포함되거나 전체 키 크기 매개 변수로 사용됩니다.

다수의 소프트웨어 보안 취약점과 마찬가지로 약한 암호화: 사용자 제어 키 크기는 목적 달성을 위한 수단이며 그 자체가 목적은 아닙니다. 이 취약점은 본질적으로 간단 명료합니다. 즉, 공격자가 응용 프로그램에 악성 데이터를 전달하며 이 데이터가 암호화를 수행하는 동안 키 크기 값의 전체 또는 일부로 사용됩니다.

사용자 제어 키 크기가 있을 때의 문제는 다양한 공격이 가능해질 수 있다는 점입니다.

1. 공격자는 이 취약점을 이용하여 자신이 접근할 수 있는 데이터와 관련된 암호화 작업에 대해 키 크기를 0으로 지정할 수 있습니다. 이렇게 되면 여러 알고리즘을 빈 키와 함께 사용하여 자신의 데이터를 해독할 수 있기 때문에 응용 프로그램 내에서 사용되는 암호화 구현에 대한 정보가 누출될 수 있습니다. 이에 따라 공격자가 크랙하는 동안 특정 알고리즘에 집중할 수 있도록 하여 다른 사용자의 암호화된 데이터를 보다 쉽게 해독하게 될 수 있습니다.
2. 공격자가 다른 사용자의 암호화 키 크기를 조작할 수 있거나 다른 사용자가 0(또는 최대한 낮은 값)인 암호화 키 크기를 사용하도록 속일 수 있다면, 공격자가 사용된 암호화 알고리즘을 파악한 후 다른 사용자의 암호화된 데이터를 판독할 수 있게 됩니다.

예제 1: 다음 코드에서는 사용자가 제어하는 키 크기 매개 변수를 사용하여 AES 암호화를 수행합니다.

...
Properties prop = new Properties();
prop.load(new FileInputStream("config.properties"));
String keySize = prop.getProperty("keySize");
...
PBEKeySpec spec = new PBEKeySpec(
                password.toCharArray(),
                saltBytes,
                pswdIterations,
                Integer.parseInt(keySize)
                );
SecretKey secretKey = factory.generateSecret(spec);
SecretKeySpec secret = new SecretKeySpec(secretKey.getEncoded(), "AES");
...
Example 1의 코드는 성공적으로 실행되지만 이 기능을 사용할 수 있는 사용자는 누구든지 keySize 속성을 수정하여 암호화 알고리즘에 대한 키 크기 매개 변수를 조작할 수 있습니다. 프로그램을 공개한 후에는 악의적인 사용자가 지정된 암호화 작업의 키 크기를 알아내었는지 여부를 파악하기가 상당히 어렵기 때문에 사용자 제어 키 크기와 관련된 문제를 되돌리기가 힘들 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 326
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002450
[3] Standards Mapping - FIPS200 MP
[4] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[9] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[11] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[14] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[15] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[16] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
desc.dataflow.java.weak_encryption_user_controlled_key_size
Abstract
키 크기 매개 변수를 사용하는 암호화 함수에는 감염된 키 크기 값을 전달해서는 안 됩니다.
Explanation
사용자가 제어하는 값을 통해 키 크기를 결정할 수 있도록 허용하면 공격자가 빈 키를 지정하여 빈 키로 암호화된 데이터를 비교적 손쉽게 해독할 수 있게 됩니다. 0이 아닌 값을 지정해야 하더라도 공격자는 여전히 최대한 낮은 값을 지정하여 암호화의 보안 수준을 떨어뜨릴 수 있습니다.

약한 암호화: 사용자 제어 키 크기 이슈는 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스를 통해 데이터가 프로그램에 입력됩니다.

2. 암호화 함수 내에서 사용자 제어 데이터가 키 크기 매개 변수 내에 포함되거나 전체 키 크기 매개 변수로 사용됩니다.

다수의 소프트웨어 보안 취약점과 마찬가지로 약한 암호화: 사용자 제어 키 크기는 목적 달성을 위한 수단이며 그 자체가 목적은 아닙니다. 이 취약점은 본질적으로 간단 명료합니다. 즉, 공격자가 응용 프로그램에 악성 데이터를 전달하며 이 데이터가 암호화를 수행하는 동안 키 크기 값의 전체 또는 일부로 사용됩니다.

사용자 제어 키 크기가 있을 때의 문제는 다양한 공격이 가능해질 수 있다는 점입니다.

1. 공격자는 이 취약점을 이용하여 자신이 접근할 수 있는 데이터와 관련된 암호화 작업에 대해 키 크기를 0으로 지정할 수 있습니다. 이렇게 되면 여러 알고리즘을 빈 키와 함께 사용하여 자신의 데이터를 해독할 수 있기 때문에 응용 프로그램 내에서 사용되는 암호화 구현에 대한 정보가 누출될 수 있습니다. 이에 따라 공격자가 크랙하는 동안 특정 알고리즘에 집중할 수 있도록 하여 다른 사용자의 암호화된 데이터를 보다 쉽게 해독하게 될 수 있습니다.
2. 공격자가 다른 사용자의 암호화 키 크기를 조작할 수 있거나 다른 사용자가 0(또는 최대한 낮은 값)인 암호화 키 크기를 사용하도록 속일 수 있다면, 공격자가 사용된 암호화 알고리즘을 파악한 후 다른 사용자의 암호화된 데이터를 판독할 수 있게 됩니다.

예제 1: 다음 코드에서는 사용자가 제어하는 키 크기 매개 변수를 사용하여 AES 암호화를 수행합니다.

...
@property (strong, nonatomic) IBOutlet UITextField *inputTextField;
...
CCCrypt(kCCEncrypt,
        kCCAlgorithmAES,
        kCCOptionPKCS7Padding,
        key,
        sizeof(_inputTextField.text),
        iv,
        plaintext,
        sizeof(plaintext),
        ciphertext,
        sizeof(ciphertext),
        &numBytesEncrypted);
...
Example 1의 코드는 성공적으로 실행되지만 이 기능을 사용할 수 있는 사용자는 누구든지 UITextField inputTextField의 텍스트를 수정하여 암호화 알고리즘에 대한 키 크기 매개 변수를 조작할 수 있습니다. 프로그램을 공개한 후에는 악의적인 사용자가 지정된 암호화 작업의 키 크기를 알아내었는지 여부를 파악하기가 상당히 어렵기 때문에 사용자 제어 키 크기와 관련된 문제를 되돌리기가 힘들 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 326
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002450
[3] Standards Mapping - FIPS200 MP
[4] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[9] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[11] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[14] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[15] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[16] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
desc.dataflow.objc.weak_encryption_user_controlled_key_size
Abstract
키 크기 매개 변수를 사용하는 암호화 함수에는 감염된 키 크기 값을 전달해서는 안 됩니다.
Explanation
사용자가 제어하는 값을 통해 키 크기를 결정할 수 있도록 허용하면 공격자가 빈 키를 지정하여 빈 키로 암호화된 데이터를 비교적 손쉽게 해독할 수 있게 됩니다. 0이 아닌 값을 지정해야 하더라도 공격자는 여전히 최대한 낮은 값을 지정하여 암호화의 보안 수준을 떨어뜨릴 수 있습니다.

약한 암호화: 사용자 제어 키 크기 이슈는 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스를 통해 데이터가 프로그램에 입력됩니다.

2. 암호화 함수 내에서 사용자 제어 데이터가 키 크기 매개 변수 내에 포함되거나 전체 키 크기 매개 변수로 사용됩니다.

다수의 소프트웨어 보안 취약점과 마찬가지로 약한 암호화: 사용자 제어 키 크기는 목적 달성을 위한 수단이며 그 자체가 목적은 아닙니다. 이 취약점은 본질적으로 간단 명료합니다. 즉, 공격자가 응용 프로그램에 악성 데이터를 전달하며 이 데이터가 암호화를 수행하는 동안 키 크기 값의 전체 또는 일부로 사용됩니다.

사용자 제어 키 크기가 있을 때의 문제는 다양한 공격이 가능해질 수 있다는 점입니다.

1. 공격자는 이 취약점을 이용하여 자신이 접근할 수 있는 데이터와 관련된 암호화 작업에 대해 키 크기를 0으로 지정할 수 있습니다. 이렇게 되면 여러 알고리즘을 빈 키와 함께 사용하여 자신의 데이터를 해독할 수 있기 때문에 응용 프로그램 내에서 사용되는 암호화 구현에 대한 정보가 누출될 수 있습니다. 이에 따라 공격자가 크랙하는 동안 특정 알고리즘에만 집중할 수 있도록 하여 다른 사용자의 암호화된 데이터를 보다 쉽게 해독하게 될 수 있습니다.
2. 공격자가 다른 사용자의 암호화 키 크기를 조작할 수 있거나 다른 사용자가 0(또는 최대한 낮은 값)인 암호화 키 크기를 사용하도록 속일 수 있다면, 공격자가 사용된 암호화 알고리즘을 파악한 후 다른 사용자의 암호화된 데이터를 판독할 수 있게 됩니다.

예제 1: 다음 코드는 암호에서 키를 파생하지만 사용자가 제어하는 파생된 키 길이를 사용합니다.

...
$hash = hash_pbkdf2('sha256', $password, $random_salt, 100000, strlen($password));
...
Example 1의 코드는 성공적으로 실행되지만 user_input 변수는 사용자가 제어할 수 있으므로 이 기능을 사용할 수 있는 사용자는 누구든지 암호화 알고리즘에 대해 키 크기 매개 변수를 조작할 수 있습니다. 프로그램을 공개한 후에는 악의적인 사용자가 지정된 암호화 작업의 키 크기를 알아내었는지 여부를 파악하기가 상당히 어렵기 때문에 사용자 제어 키 크기와 관련된 문제를 되돌리기가 힘들 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 326
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002450
[3] Standards Mapping - FIPS200 MP
[4] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[9] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[11] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[14] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[15] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[16] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
desc.dataflow.php.weak_encryption_user_controlled_key_size
Abstract
키 크기 매개 변수를 사용하는 암호화 함수에는 감염된 키 크기 값을 전달해서는 안 됩니다.
Explanation
사용자가 제어하는 값을 통해 키 크기를 결정할 수 있도록 허용하면 공격자가 빈 키를 지정하여 빈 키로 암호화된 데이터를 비교적 손쉽게 해독할 수 있게 됩니다. 0이 아닌 값을 지정해야 하더라도 공격자는 여전히 최대한 낮은 값을 지정하여 암호화의 보안 수준을 떨어뜨릴 수 있습니다.

약한 암호화: 사용자 제어 키 크기 이슈는 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스를 통해 데이터가 프로그램에 입력됩니다.

2. 암호화 함수 내에서 사용자 제어 데이터가 키 크기 매개 변수 내에 포함되거나 전체 키 크기 매개 변수로 사용됩니다.

다수의 소프트웨어 보안 취약점과 마찬가지로 약한 암호화: 사용자 제어 키 크기는 목적 달성을 위한 수단이며 그 자체가 목적은 아닙니다. 이 취약점은 본질적으로 간단 명료합니다. 즉, 공격자가 응용 프로그램에 악성 데이터를 전달하며 이 데이터가 암호화를 수행하는 동안 키 크기 값의 전체 또는 일부로 사용됩니다.

사용자 제어 키 크기가 있을 때의 문제는 다양한 공격이 가능해질 수 있다는 점입니다.

1. 공격자는 이 취약점을 이용하여 자신이 접근할 수 있는 데이터와 관련된 암호화 작업에 대해 키 크기를 0으로 지정할 수 있습니다. 이렇게 되면 여러 알고리즘을 빈 키와 함께 사용하여 자신의 데이터를 해독할 수 있기 때문에 응용 프로그램 내에서 사용되는 암호화 구현에 대한 정보가 누출될 수 있습니다. 이에 따라 공격자가 크랙하는 동안 특정 알고리즘에 집중할 수 있도록 하여 다른 사용자의 암호화된 데이터를 보다 쉽게 해독하게 될 수 있습니다.
2. 공격자가 다른 사용자의 암호화 키 크기를 조작할 수 있거나 다른 사용자가 0(또는 최대한 낮은 값)인 암호화 키 크기를 사용하도록 속일 수 있다면, 공격자가 사용된 암호화 알고리즘을 파악한 후 다른 사용자의 암호화된 데이터를 판독할 수 있게 됩니다.

예제 1: 다음 코드는 암호에서 키를 파생하지만 사용자가 제어하는 파생된 키 길이를 사용합니다.

...
dk = hashlib.pbkdf2_hmac('sha256', password, random_salt, 100000, dklen=user_input)
...
Example 1의 코드는 성공적으로 실행되지만 user_input 변수는 사용자가 제어할 수 있으므로 이 기능을 사용할 수 있는 사용자는 누구든지 암호화 알고리즘에 대해 키 크기 매개 변수를 조작할 수 있습니다. 프로그램을 공개한 후에는 악의적인 사용자가 지정된 암호화 작업의 키 크기를 알아내었는지 여부를 파악하기가 상당히 어렵기 때문에 사용자 제어 키 크기와 관련된 문제를 되돌리기가 힘들 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 326
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002450
[3] Standards Mapping - FIPS200 MP
[4] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[9] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[11] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[14] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[15] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[16] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
desc.dataflow.python.weak_encryption_user_controlled_key_size
Abstract
키 크기 매개 변수를 사용하는 암호화 함수에는 감염된 키 크기 값을 전달해서는 안 됩니다.
Explanation
사용자가 제어하는 값을 통해 키 크기를 결정할 수 있도록 허용하면 공격자가 빈 키를 지정하여 빈 키로 암호화된 데이터를 비교적 손쉽게 해독할 수 있게 됩니다. 0이 아닌 값을 지정해야 하더라도 공격자는 여전히 최대한 낮은 값을 지정하여 암호화의 보안 수준을 떨어뜨릴 수 있습니다.

약한 암호화: 사용자 제어 키 크기 이슈는 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스를 통해 데이터가 프로그램에 입력됩니다.

2. 암호화 함수 내에서 사용자 제어 데이터가 키 크기 매개 변수 내에 포함되거나 전체 키 크기 매개 변수로 사용됩니다.

다수의 소프트웨어 보안 취약점과 마찬가지로 약한 암호화: 사용자 제어 키 크기는 목적 달성을 위한 수단이며 그 자체가 목적은 아닙니다. 이 취약점은 본질적으로 간단 명료합니다. 즉, 공격자가 응용 프로그램에 악성 데이터를 전달하며 이 데이터가 암호화를 수행하는 동안 키 크기 값의 전체 또는 일부로 사용됩니다.

사용자 제어 키 크기가 있을 때의 문제는 다양한 공격이 가능해질 수 있다는 점입니다.

1. 공격자는 이 취약점을 이용하여 자신이 접근할 수 있는 데이터와 관련된 암호화 작업에 대해 키 크기를 0으로 지정할 수 있습니다. 이렇게 되면 여러 알고리즘을 빈 키와 함께 사용하여 자신의 데이터를 해독할 수 있기 때문에 응용 프로그램 내에서 사용되는 암호화 구현에 대한 정보가 누출될 수 있습니다. 이에 따라 공격자가 크랙하는 동안 특정 알고리즘에 집중할 수 있도록 하여 다른 사용자의 암호화된 데이터를 보다 쉽게 해독하게 될 수 있습니다.
2. 공격자가 다른 사용자의 암호화 키 크기를 조작할 수 있거나 다른 사용자가 0(또는 최대한 낮은 값)인 암호화 키 크기를 사용하도록 속일 수 있다면, 공격자가 사용된 암호화 알고리즘을 파악한 후 다른 사용자의 암호화된 데이터를 판독할 수 있게 됩니다.

예제 1: 다음 코드는 암호에서 키를 파생하지만 사용자가 제어하는 파생된 키 길이를 사용합니다.

...
dk = OpenSSL::PKCS5.pbkdf2_hmac(password, random_salt, 100000, user_input, digest)
...
Example 1의 코드는 성공적으로 실행되지만 user_input 변수는 사용자가 제어할 수 있으므로 이 기능을 사용할 수 있는 사용자는 누구든지 암호화 알고리즘에 대해 키 크기 매개 변수를 조작할 수 있습니다. 프로그램을 공개한 후에는 악의적인 사용자가 지정된 암호화 작업의 키 크기를 알아내었는지 여부를 파악하기가 상당히 어렵기 때문에 사용자 제어 키 크기와 관련된 문제를 되돌리기가 힘들 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 326
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002450
[3] Standards Mapping - FIPS200 MP
[4] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[9] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[11] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[14] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[15] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[16] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
desc.dataflow.ruby.weak_encryption_user_controlled_key_size
Abstract
키 크기 매개 변수를 사용하는 암호화 함수에는 감염된 키 크기 값을 전달해서는 안 됩니다.
Explanation
사용자가 제어하는 값을 통해 키 크기를 결정할 수 있도록 허용하면 공격자가 빈 키를 지정하여 빈 키로 암호화된 데이터를 비교적 손쉽게 해독할 수 있게 됩니다. 0이 아닌 값을 지정해야 하더라도 공격자는 여전히 최대한 낮은 값을 지정하여 암호화의 보안 수준을 떨어뜨릴 수 있습니다.

약한 암호화: 사용자 제어 키 크기 문제는 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스를 통해 데이터가 프로그램에 입력됩니다.

2. 암호화 함수 내에서 사용자 제어 데이터가 키 크기 매개 변수 내에 포함되거나 전체 키 크기 매개 변수로 사용됩니다.

여러 소프트웨어 보안 취약점과 마찬가지로 약한 암호화: 사용자 제어 키 크기는 목적의 수단일 뿐 목적 자체는 아닙니다. 이 취약점은 본질적으로 간단 명료합니다. 즉, 공격자가 응용 프로그램에 악성 데이터를 전달하며 이 데이터가 암호화를 수행하는 동안 키 크기 값의 전체 또는 일부로 사용됩니다.

사용자 제어 키 크기가 있을 때의 문제는 다양한 공격이 가능해질 수 있다는 점입니다.

1. 공격자는 이 취약점을 이용하여 자신이 접근할 수 있는 데이터와 관련된 암호화 작업에 대해 키 크기를 0으로 지정할 수 있습니다. 이렇게 되면 여러 알고리즘을 빈 키와 함께 사용하여 자신의 데이터를 해독할 수 있기 때문에 응용 프로그램 내에서 사용되는 암호화 구현에 대한 정보가 누출될 수 있습니다. 이에 따라 공격자가 크랙하는 동안 특정 알고리즘에 집중할 수 있도록 하여 다른 사용자의 암호화된 데이터를 보다 쉽게 해독하게 될 수 있습니다.
2. 공격자가 다른 사용자의 암호화 키 크기를 조작할 수 있거나 다른 사용자가 0(또는 최대한 낮은 값)인 암호화 키 크기를 사용하도록 속일 수 있다면, 공격자가 사용된 암호화 알고리즘을 파악한 후 다른 사용자의 암호화된 데이터를 판독할 수 있게 됩니다.

예제 1: 다음 코드는 사용자 제어 키 크기 매개 변수를 사용하여 AES 암호화를 수행합니다.

...
@IBOutlet weak var inputTextField : UITextField!
...
let key = (inputTextField.text as NSString).dataUsingEncoding(NSUTF8StringEncoding)
let keyPointer = UnsafePointer<UInt8>(key.bytes)
let keyLength = size_t(key.length)
...
let operation : CCOperation = UInt32(kCCEncrypt)
let algoritm : CCAlgorithm = UInt32(kCCAlgorithmAES128)
let options : CCOptions = UInt32(kCCOptionPKCS7Padding)
var numBytesEncrypted :size_t = 0
CCCrypt(operation,
        algorithm,
        options,
        keyPointer,
        keyLength,
        iv,
        plaintextPointer,
        plaintextLength,
        ciphertextPointer,
        ciphertextLength,
        &numBytesEncrypted)
...
Example 1의 코드는 성공적으로 실행되지만 이 기능을 사용할 수 있는 사용자는 누구든지 UITextField inputTextField의 텍스트를 수정하여 암호화 알고리즘에 대한 키 크기 매개 변수를 조작할 수 있습니다. 프로그램을 공개한 후에는 악의적인 사용자가 지정된 암호화 작업의 키 크기를 알아내었는지 여부를 파악하기가 상당히 어렵기 때문에 사용자 제어 키 크기와 관련된 문제를 되돌리기가 힘들 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 326
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002450
[3] Standards Mapping - FIPS200 MP
[4] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AU-10 Non-Repudiation (P2), SC-12 Cryptographic Key Establishment and Management (P1), SC-13 Cryptographic Protection (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-10 Non-Repudiation, SC-12 Cryptographic Key Establishment and Management, SC-13 Cryptographic Protection
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 2.8.3 Single or Multi Factor One Time Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 6.2.3 Algorithms (L2 L3), 6.2.4 Algorithms (L2 L3), 6.2.5 Algorithms (L2 L3), 6.2.6 Algorithms (L2 L3), 9.1.2 Communications Security Requirements (L1 L2 L3), 9.1.3 Communications Security Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M6 Broken Cryptography
[9] Standards Mapping - OWASP Mobile 2024 M10 Insufficient Cryptography
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CRYPTO-1
[11] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage
[14] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure
[15] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure
[16] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.6.1, Requirement 6.5.8
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.6.1, Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.6.1, Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.6.1, Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.6.1, Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.6.1, Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.6.1, Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.6.1, Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.6.1, Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.2 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000590 CAT II, APSC-DV-002010 CAT II, APSC-DV-002040 CAT II
desc.dataflow.swift.weak_encryption_user_controlled_key_size

WSE Misconfiguration: Insufficient Encryption

Abstract
서명을 암호화하지 않으면 무차별 대입 공격이 성공할 가능성이 높아집니다.
Explanation
MessageProtectionOrder 속성을 사용하면 서명 및 암호화가 적용되는 순서(및 서명을 암호화해야 하는지 여부)를 지정할 수 있습니다. MessageProtectionOrder 속성을 SignBeforeEncryptAndEncryptSignature가 아닌 값으로 설정하는 것은 잠재적 보안 문제로 간주됩니다.

다음은 SignBeforeEncryptAndEncryptSignature 및 해당 관련 문제에 대한 가능한 대안 목록입니다.
SignBeforeEncrypt - 암호화되지 않은 메시지에 서명이 적용되지만 서명 자체는 암호화되지 않습니다.
EncryptBeforeSign - 메시지 내용이 암호화된 다음 서명됩니다.

암호와 같은 낮은 엔트로피 키로 서명된 메시지는 무차별 대입 공격에 더 취약합니다.
References
[1] MessageProtectionOrder Enumeration Microsoft
[2] Standards Mapping - Common Weakness Enumeration CWE ID 311
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000068, CCI-002418, CCI-002420, CCI-002421, CCI-002422
[4] Standards Mapping - FIPS200 CM
[5] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-17 Remote Access (P1), SC-8 Transmission Confidentiality and Integrity (P1)
[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-17 Remote Access, SC-8 Transmission Confidentiality and Integrity
[8] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration
[9] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 8.1.6 General Data Protection (L3)
[10] Standards Mapping - OWASP Mobile 2014 M3 Insufficient Transport Layer Protection
[11] Standards Mapping - OWASP Top 10 2004 A10 Insecure Configuration Management
[12] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage
[13] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration
[14] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration
[15] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration
[16] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.3, Requirement 6.5.8
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.3
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.3
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.3
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.3
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.3
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.1 - Use of Cryptography
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design
[29] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 311
[30] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 311
[31] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3150.1 CAT II, APP3260.1 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3150.1 CAT II, APP3260 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3150.1 CAT II, APP3260 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3150.1 CAT II, APP3260 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3150.1 CAT II, APP3260 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3150.1 CAT II, APP3260 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3150.1 CAT II, APP3260 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[52] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[53] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000260 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[54] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Transport Layer Protection (WASC-04)
[55] Standards Mapping - Web Application Security Consortium 24 + 2 Information Leakage
desc.config.dotnet.wse_misconfiguration_insufficient_encryption

WSE Misconfiguration: Missing Authorization

Abstract
<authorization> 태그를 명시적으로 설정하지 않으면 권한 에스컬레이션 또는 익명 액세스가 발생할 수 있습니다.
Explanation
<authorization> 요소는 권한 부여 규칙 목록을 지정합니다. <authorization> 요소가 존재하고 발신자에게 적용되는 규칙이 없으면 액세스가 거부됩니다[1].
이 경우, 식별된 구성 파일에 <authorization> 태그가 없으므로 익명 액세스가 가능할 수 있습니다.
References
[1] Element Microsoft
[2] Standards Mapping - Common Weakness Enumeration CWE ID 285
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-000804, CCI-002165
[4] Standards Mapping - FIPS200 CM
[5] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation
[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), IA-8 Identification and Authentication (Non-Organizational Users) (P1)
[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, IA-8 Identification and Authentication (Non-Organizational Users)
[8] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration
[9] Standards Mapping - OWASP Application Security Verification Standard 4.0 4.1.3 General Access Control Design (L1 L2 L3), 4.1.5 General Access Control Design (L1 L2 L3), 4.2.1 Operation Level Access Control (L1 L2 L3), 13.1.4 Generic Web Service Security Verification Requirements (L2 L3)
[10] Standards Mapping - OWASP Mobile 2014 M5 Poor Authorization and Authentication
[11] Standards Mapping - OWASP Top 10 2004 A10 Insecure Configuration Management
[12] Standards Mapping - OWASP Top 10 2007 A10 Failure to Restrict URL Access
[13] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration
[14] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration
[15] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration
[16] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10, Requirement 7.2
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.10, Requirement 7.2
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8, Requirement 7.2
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8, Requirement 7.2
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8, Requirement 7.2
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8, Requirement 7.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8, Requirement 7.2
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4, Requirement 7.3.2
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4, Requirement 7.3.2
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.4 - Authentication and Access Control, Control Objective C.2.3 - Web Software Access Controls
[29] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 285
[30] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 285
[31] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3480.2 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3480.2 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3480.2 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3480.2 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3480.2 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3480.2 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3480.2 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[49] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[50] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[51] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[52] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[53] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II
[54] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Authorization (WASC-02)
[55] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Authorization
desc.config.dotnet.wse_misconfiguration_missing_authorization

WSE Misconfiguration: Unsigned Fault Timestamp

Abstract
서명되지 않은 타임스탬프는 SOAP 메시지를 변조 및 재생 공격에 노출시킬 수 있습니다.
Explanation
보안 타임스탬프는 메시지의 최근성을 나타냅니다. 공격자가 메시지를 가로채 나중에 다시 전송하는 경우 타임스탬프가 메시지가 오래되었음을 나타내므로 수신자가 재생 공격을 거부할 수 있습니다. 필요한 경우 타임스탬프에 보안 의미 체계의 유효 기간에 엄격한 제한을 두는 만료 속성을 포함할 수 있습니다.

공격자가 타임스탬프를 조작하는 것을 막으려면 타임스탬프를 서명해야 합니다. 서명된 타임스탬프가 없으면 공격자는 SOAP 메시지를 가로채서 타임스탬프를 수정하고 수신자가 모르는 사이에 메시지를 보낼 수 있습니다. 이러한 상황에서 공격자는 수신자를 속여서 악의적인 메시지를 수락하도록 할 수 있습니다.

WSE 정책 파일의 다음 조각은 SOAP 오류에 타임스탬프가 포함되지 않은 예입니다.

<policies>
...
      <protection>
        <fault signatureOptions="IncludeAddressing, IncludeSoapBody" encryptBody="true" />
References
[1] Element Microsoft
[2] Standards Mapping - Common Weakness Enumeration CWE ID 345
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001453, CCI-001941, CCI-001942, CCI-002418, CCI-002420, CCI-002421, CCI-002422
[4] Standards Mapping - FIPS200 CM
[5] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-17 Remote Access (P1), AU-10 Non-Repudiation (P2), IA-2 Identification and Authentication (Organizational Users) (P1), SC-8 Transmission Confidentiality and Integrity (P1)
[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-17 Remote Access, AU-10 Non-Repudiation, IA-2 Identification and Authentication (Organizational Users), SC-8 Transmission Confidentiality and Integrity
[8] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration
[9] Standards Mapping - OWASP Application Security Verification Standard 4.0 3.5.3 Token-based Session Management (L2 L3), 13.2.6 RESTful Web Service Verification Requirements (L2 L3)
[10] Standards Mapping - OWASP Mobile 2014 M3 Insufficient Transport Layer Protection
[11] Standards Mapping - OWASP Top 10 2004 A10 Insecure Configuration Management
[12] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration
[13] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration
[14] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration
[15] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.4
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.4
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.4
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.4
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[23] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography
[24] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography
[25] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography, Control Objective C.4.1 - Web Software Communications
[26] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3260.1 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3860 CAT II, APP3260 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3860 CAT II, APP3260 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3860 CAT II, APP3260 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3860 CAT II, APP3260 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3860 CAT II, APP3260 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3860 CAT II, APP3260 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[49] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Transport Layer Protection (WASC-04)
desc.config.dotnet.wse_misconfiguration_unsigned_fault_timestamp

WSE Misconfiguration: Unsigned Request Timestamp

Abstract
서명되지 않은 타임스탬프는 SOAP 메시지를 변조 및 재생 공격에 노출시킬 수 있습니다.
Explanation
보안 타임스탬프는 메시지의 최근성을 나타냅니다. 공격자가 메시지를 가로채 나중에 다시 전송하는 경우 타임스탬프가 메시지가 오래되었음을 나타내므로 수신자가 재생 공격을 거부할 수 있습니다. 필요한 경우 타임스탬프에 보안 의미 체계의 유효 기간에 엄격한 제한을 두는 만료 속성을 포함할 수 있습니다.

공격자가 타임스탬프를 조작하는 것을 막으려면 타임스탬프를 서명해야 합니다. 서명된 타임스탬프가 없으면 공격자는 SOAP 메시지를 가로채서 타임스탬프를 수정하고 수신자가 모르는 사이에 메시지를 보낼 수 있습니다. 이러한 상황에서 공격자는 수신자를 속여서 악의적인 메시지를 수락하도록 할 수 있습니다.

WSE 정책 파일의 다음 조각은 SOAP 메시지 요청에 타임스탬프가 포함되지 않은 예입니다.

<policies>
...
      <protection>
        <request signatureOptions="IncludeAddressing, IncludeSoapBody" encryptBody="true" />
References
[1] Element Microsoft
[2] Standards Mapping - Common Weakness Enumeration CWE ID 345
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001453, CCI-001941, CCI-001942, CCI-002418, CCI-002420, CCI-002421, CCI-002422
[4] Standards Mapping - FIPS200 CM
[5] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-17 Remote Access (P1), AU-10 Non-Repudiation (P2), IA-2 Identification and Authentication (Organizational Users) (P1), SC-8 Transmission Confidentiality and Integrity (P1)
[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-17 Remote Access, AU-10 Non-Repudiation, IA-2 Identification and Authentication (Organizational Users), SC-8 Transmission Confidentiality and Integrity
[8] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration
[9] Standards Mapping - OWASP Application Security Verification Standard 4.0 3.5.3 Token-based Session Management (L2 L3), 13.2.6 RESTful Web Service Verification Requirements (L2 L3)
[10] Standards Mapping - OWASP Mobile 2014 M3 Insufficient Transport Layer Protection
[11] Standards Mapping - OWASP Top 10 2004 A10 Insecure Configuration Management
[12] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration
[13] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration
[14] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration
[15] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.4
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.4
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.4
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.4
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[23] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography
[24] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography
[25] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography, Control Objective C.4.1 - Web Software Communications
[26] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3260.1 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3860 CAT II, APP3260 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3860 CAT II, APP3260 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3860 CAT II, APP3260 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3860 CAT II, APP3260 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3860 CAT II, APP3260 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3860 CAT II, APP3260 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[49] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Transport Layer Protection (WASC-04)
desc.config.dotnet.wse_misconfiguration_unsigned_request_timestamp

WSE Misconfiguration: Unsigned Response Timestamp

Abstract
서명되지 않은 타임스탬프는 SOAP 메시지를 변조 및 재생 공격에 노출시킬 수 있습니다.
Explanation
보안 타임스탬프는 메시지의 최근성을 나타냅니다. 공격자가 메시지를 가로채 나중에 다시 전송하는 경우 타임스탬프가 메시지가 오래되었음을 나타내므로 수신자가 재생 공격을 거부할 수 있습니다. 필요한 경우 타임스탬프에 보안 의미 체계의 유효 기간에 엄격한 제한을 두는 만료 속성을 포함할 수 있습니다.

공격자가 타임스탬프를 조작하는 것을 막으려면 타임스탬프를 서명해야 합니다. 서명된 타임스탬프가 없으면 공격자는 SOAP 메시지를 가로채서 타임스탬프를 수정하고 수신자가 모르는 사이에 메시지를 보낼 수 있습니다. 이러한 상황에서 공격자는 수신자를 속여서 악의적인 메시지를 수락하도록 할 수 있습니다.

WSE 정책 파일의 다음 조각은 SOAP 메시지 응답에 타임스탬프가 포함되지 않은 예입니다.

<policies>
...
      <protection>
        <response signatureOptions="IncludeAddressing, IncludeSoapBody" encryptBody="true" />
References
[1] Element Microsoft
[2] Standards Mapping - Common Weakness Enumeration CWE ID 345
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001453, CCI-001941, CCI-001942, CCI-002418, CCI-002420, CCI-002421, CCI-002422
[4] Standards Mapping - FIPS200 CM
[5] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection
[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-17 Remote Access (P1), AU-10 Non-Repudiation (P2), IA-2 Identification and Authentication (Organizational Users) (P1), SC-8 Transmission Confidentiality and Integrity (P1)
[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-17 Remote Access, AU-10 Non-Repudiation, IA-2 Identification and Authentication (Organizational Users), SC-8 Transmission Confidentiality and Integrity
[8] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration
[9] Standards Mapping - OWASP Application Security Verification Standard 4.0 3.5.3 Token-based Session Management (L2 L3), 13.2.6 RESTful Web Service Verification Requirements (L2 L3)
[10] Standards Mapping - OWASP Mobile 2014 M3 Insufficient Transport Layer Protection
[11] Standards Mapping - OWASP Top 10 2004 A10 Insecure Configuration Management
[12] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration
[13] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration
[14] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration
[15] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.4
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.4
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.4
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.4
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[23] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography
[24] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography
[25] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 6.3 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography, Control Objective C.4.1 - Web Software Communications
[26] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3260.1 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3860 CAT II, APP3260 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3860 CAT II, APP3260 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3860 CAT II, APP3260 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3860 CAT II, APP3260 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3860 CAT II, APP3260 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3860 CAT II, APP3260 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[45] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000180 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[46] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[47] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[48] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000180 CAT II, APSC-DV-000590 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II
[49] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Transport Layer Protection (WASC-04)
desc.config.dotnet.wse_misconfiguration_unsigned_response_timestamp

XML Entity Expansion Injection

Abstract
DTD(문서 유형 정의) 항목 확인을 차단하거나 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML Entity Expansion Injection에 노출될 수 있습니다.
Explanation
XML Bombs라고도 하는 XML Entity Expansion Injection은 서버의 할당된 리소스를 모두 소진할 때까지 기하급수적으로 확장하고 올바른 형식의 XML 블록을 이용하는 DoS 공격입니다. XML을 사용하면 문자열 대체 매크로 역할을 하는 사용자 지정 항목을 정의할 수 있습니다. 공격자는 반복적인 항목 확인을 중첩하여 서버 리소스를 손쉽게 중단시킬 수 있습니다.

다음 XML 문서는 XML Bomb의 예를 보여줍니다.

    <?xml version="1.0"?>
    <!DOCTYPE lolz [
      <!ENTITY lol "lol">
      <!ENTITY lol2 "&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;">
      <!ENTITY lol3 "&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;">
      <!ENTITY lol4 "&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;">
      <!ENTITY lol5 "&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;">
      <!ENTITY lol6 "&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;">
      <!ENTITY lol7 "&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;">
      <!ENTITY lol8 "&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;">
      <!ENTITY lol9 "&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;">
    ]>
    <lolz>&lol9;</lolz>


이 테스트는 작은 XML 문서를 3 GB 이상의 메모리로 확장하여 서버를 중단시킬 수 있습니다.
References
[1] XML External Entity (XXE) Processing OWASP
[2] Testing for XML Injection OWASP
[3] XML External Entities The Web Application Security Consortium
[4] Standards Mapping - Common Weakness Enumeration CWE ID 776
[5] Standards Mapping - Common Weakness Enumeration Top 25 2024 [24] CWE ID 400
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385
[7] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[8] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[9] Standards Mapping - OWASP API 2023 API4 Unrestricted Resource Consumption
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 12.1.2 File Upload Requirements (L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls
[12] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[14] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[15] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2010 A1 Injection
[17] Standards Mapping - OWASP Top 10 2013 A1 Injection
[18] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[19] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[30] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[53] Standards Mapping - Web Application Security Consortium Version 2.00 XML Entity Expansion (WASC-44)
[54] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.dataflow.abap.xml_entity_expansion_injection
Abstract
DTD(문서 유형 정의) 항목 확인을 차단하거나 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML Entity Expansion Injection에 노출될 수 있습니다.
Explanation
XML 엔터티 확장 injection 공격은 서버의 할당된 리소스를 모두 소모할 때까지 기하급수적으로 확장되는, 올바른 형식의 유효한 XML 블록을 이용하는 DoS 공격입니다. XML을 사용하면 문자열 대체 매크로로 작동하는 사용자 지정 엔터티를 정의할 수 있습니다. 되풀이되는 엔터티 확인을 중첩시켜 공격자가 서버 리소스를 쉽게 중단시킬 수 있습니다.

다음 XML 문서에서는 XML 폭탄의 예를 보여 줍니다.

<?xml version="1.0"?>
<!DOCTYPE lolz [
  <!ENTITY lol "lol">
  <!ENTITY lol2 "&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;">
  <!ENTITY lol3 "&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;">
  <!ENTITY lol4 "&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;">
  <!ENTITY lol5 "&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;">
  <!ENTITY lol6 "&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;">
  <!ENTITY lol7 "&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;">
  <!ENTITY lol8 "&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;">
  <!ENTITY lol9 "&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;">
]>
<lolz>&lol9;</lolz>


이 테스트는 작은 XML 문서를 메모리에서 3GB 이상으로 확장시켜 서버를 중단시킬 수 있습니다.
References
[1] XML Denial of Service Attacks and Defenses MSDN Magazine
[2] XML External Entity (XXE) Processing OWASP
[3] Testing for XML Injection OWASP
[4] XML External Entities The Web Application Security Consortium
[5] Standards Mapping - Common Weakness Enumeration CWE ID 776
[6] Standards Mapping - Common Weakness Enumeration Top 25 2024 [24] CWE ID 400
[7] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[10] Standards Mapping - OWASP API 2023 API4 Unrestricted Resource Consumption
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 12.1.2 File Upload Requirements (L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[20] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[31] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[54] Standards Mapping - Web Application Security Consortium Version 2.00 XML Entity Expansion (WASC-44)
[55] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.controlflow.dotnet.xml_entity_expansion_injection
Abstract
DTD(문서 유형 정의) 항목 확인을 차단하거나 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML Entity Expansion Injection에 노출될 수 있습니다.
Explanation
XML Bombs라고 하는 XML Entity Expansion injection은 서버의 할당된 리소스를 모두 소모할 때까지 기하급수적으로 확장되는 올바른 형식의 유효한 XML 블록을 이용하는 DoS(Denial Of Service) 공격입니다. XML을 사용하면 문자열 대체 매크로로 작동하는 사용자 지정 엔터티를 정의할 수 있습니다. 되풀이되는 엔터티 확인을 중첩시켜 공격자가 서버 리소스를 쉽게 중단시킬 수 있습니다.

다음 XML 문서에서는 XML 폭탄의 예를 보여 줍니다.

<?xml version="1.0"?>
<!DOCTYPE lolz [
  <!ENTITY lol "lol">
  <!ENTITY lol2 "&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;">
  <!ENTITY lol3 "&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;">
  <!ENTITY lol4 "&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;">
  <!ENTITY lol5 "&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;">
  <!ENTITY lol6 "&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;">
  <!ENTITY lol7 "&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;">
  <!ENTITY lol8 "&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;">
  <!ENTITY lol9 "&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;">
]>
<lolz>&lol9;</lolz>


이 테스트는 작은 XML 문서를 메모리에서 3GB 이상으로 확장시켜 서버를 중단시킬 수 있습니다.
References
[1] XML External Entity (XXE) Processing OWASP
[2] Testing for XML Injection OWASP
[3] XML External Entities The Web Application Security Consortium
[4] INJECT-5: Restrict XML inclusion Oracle
[5] Standards Mapping - Common Weakness Enumeration CWE ID 776
[6] Standards Mapping - Common Weakness Enumeration Top 25 2024 [24] CWE ID 400
[7] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[10] Standards Mapping - OWASP API 2023 API4 Unrestricted Resource Consumption
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 12.1.2 File Upload Requirements (L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[20] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[31] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[54] Standards Mapping - Web Application Security Consortium Version 2.00 XML Entity Expansion (WASC-44)
[55] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.controlflow.java.xee_injection
Abstract
DTD(문서 유형 정의) 항목 확인을 차단하거나 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML Entity Expansion Injection에 노출될 수 있습니다.
Explanation
XML Bombs라고도 하는 XML Entity Expansion Injection은 서버의 할당된 리소스를 모두 소진할 때까지 기하급수적으로 확장하고 올바른 형식의 XML 블록을 이용하는 DoS 공격입니다. XML을 사용하면 문자열 대체 매크로 역할을 하는 사용자 지정 항목을 정의할 수 있습니다. 공격자는 반복적인 항목 확인을 중첩하여 서버 리소스를 손쉽게 중단시킬 수 있습니다.

다음 XML 문서는 XML Bomb의 예를 보여줍니다.

    <?xml version="1.0"?>
    <!DOCTYPE lolz [
      <!ENTITY lol "lol">
      <!ENTITY lol2 "&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;">
      <!ENTITY lol3 "&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;">
      <!ENTITY lol4 "&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;">
      <!ENTITY lol5 "&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;">
      <!ENTITY lol6 "&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;">
      <!ENTITY lol7 "&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;">
      <!ENTITY lol8 "&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;">
      <!ENTITY lol9 "&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;">
    ]>
    <lolz>&lol9;</lolz>


이 테스트는 작은 XML 문서를 3GB 이상의 메모리로 확장하여 서버를 중단시킬 수 있습니다.
References
[1] XML External Entity (XXE) Processing OWASP
[2] Testing for XML Injection OWASP
[3] XML External Entities The Web Application Security Consortium
[4] Standards Mapping - Common Weakness Enumeration CWE ID 776
[5] Standards Mapping - Common Weakness Enumeration Top 25 2024 [24] CWE ID 400
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385
[7] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[8] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[9] Standards Mapping - OWASP API 2023 API4 Unrestricted Resource Consumption
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 12.1.2 File Upload Requirements (L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls
[12] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[14] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[15] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2010 A1 Injection
[17] Standards Mapping - OWASP Top 10 2013 A1 Injection
[18] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[19] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[30] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[53] Standards Mapping - Web Application Security Consortium Version 2.00 XML Entity Expansion (WASC-44)
[54] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.dataflow.php.xml_entity_expansion_injection
Abstract
DTD(문서 유형 정의) 항목 확인을 차단하거나 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML Entity Expansion Injection에 노출될 수 있습니다.
Explanation
XML 폭탄이라고 하는 XML 엔터티 확장 injection은 서버의 할당된 리소스를 모두 소모할 때까지 기하급수적으로 확장되는 올바른 형식의 유효한 XML 블록을 이용하는 DoS 공격입니다. XML을 사용하면 문자열 대체 매크로로 작동하는 사용자 지정 엔터티를 정의할 수 있습니다. 되풀이되는 엔터티 확인을 중첩시켜 공격자가 서버 리소스를 쉽게 중단시킬 수 있습니다.

다음 XML 문서에서는 XML 폭탄의 예를 보여 줍니다.

<?xml version="1.0"?>
<!DOCTYPE lolz [
  <!ENTITY lol "lol">
  <!ENTITY lol2 "&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;">
  <!ENTITY lol3 "&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;">
  <!ENTITY lol4 "&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;">
  <!ENTITY lol5 "&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;">
  <!ENTITY lol6 "&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;">
  <!ENTITY lol7 "&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;">
  <!ENTITY lol8 "&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;">
  <!ENTITY lol9 "&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;">
]>
<lolz>&lol9;</lolz>


이 테스트는 작은 XML 문서를 메모리에서 3GB 이상으로 확장시켜 서버를 중단시킬 수 있습니다.
References
[1] XML vulnerabilities
[2] Announcing defusedxml, Fixes for XML Security Issues
[3] defusedxml
[4] defusedexpat
[5] XML External Entity (XXE) Processing OWASP
[6] Testing for XML Injection OWASP
[7] XML External Entities The Web Application Security Consortium
[8] Standards Mapping - Common Weakness Enumeration CWE ID 776
[9] Standards Mapping - Common Weakness Enumeration Top 25 2024 [24] CWE ID 400
[10] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385
[11] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[12] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[13] Standards Mapping - OWASP API 2023 API4 Unrestricted Resource Consumption
[14] Standards Mapping - OWASP Application Security Verification Standard 4.0 12.1.2 File Upload Requirements (L2 L3)
[15] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls
[16] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[17] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[18] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[19] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[20] Standards Mapping - OWASP Top 10 2010 A1 Injection
[21] Standards Mapping - OWASP Top 10 2013 A1 Injection
[22] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[23] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[33] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[34] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[57] Standards Mapping - Web Application Security Consortium Version 2.00 XML Entity Expansion (WASC-44)
[58] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.dataflow.python.xee_injection
Abstract
DTD(문서 유형 정의) 항목 확인을 차단하거나 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML Entity Expansion Injection에 노출될 수 있습니다.
Explanation
XML 폭탄이라고 하는 XML 엔터티 확장 injection은 서버의 할당된 리소스를 모두 소모할 때까지 기하급수적으로 확장되는 올바른 형식의 유효한 XML 블록을 이용하는 DoS 공격입니다. XML을 사용하면 문자열 대체 매크로로 작동하는 사용자 지정 엔터티를 정의할 수 있습니다. 되풀이되는 엔터티 확인을 중첩시켜 공격자가 서버 리소스를 쉽게 중단시킬 수 있습니다.

다음 XML 문서에서는 XML 폭탄의 예를 보여 줍니다.

<?xml version="1.0"?>
<!DOCTYPE lolz [
  <!ENTITY lol "lol">
  <!ENTITY lol2 "&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;">
  <!ENTITY lol3 "&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;&lol2;">
  <!ENTITY lol4 "&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;&lol3;">
  <!ENTITY lol5 "&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;&lol4;">
  <!ENTITY lol6 "&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;&lol5;">
  <!ENTITY lol7 "&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;&lol6;">
  <!ENTITY lol8 "&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;&lol7;">
  <!ENTITY lol9 "&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;&lol8;">
]>
<lolz>&lol9;</lolz>


이 테스트는 작은 XML 문서를 메모리에서 3GB 이상으로 확장시켜 서버를 중단시킬 수 있습니다.
References
[1] XML External Entity (XXE) Processing OWASP
[2] Testing for XML Injection OWASP
[3] XML External Entities The Web Application Security Consortium
[4] Standards Mapping - Common Weakness Enumeration CWE ID 776
[5] Standards Mapping - Common Weakness Enumeration Top 25 2024 [24] CWE ID 400
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385
[7] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[8] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[9] Standards Mapping - OWASP API 2023 API4 Unrestricted Resource Consumption
[10] Standards Mapping - OWASP Application Security Verification Standard 4.0 12.1.2 File Upload Requirements (L2 L3)
[11] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls
[12] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[14] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[15] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2010 A1 Injection
[17] Standards Mapping - OWASP Top 10 2013 A1 Injection
[18] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[19] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[30] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I
[53] Standards Mapping - Web Application Security Consortium Version 2.00 XML Entity Expansion (WASC-44)
[54] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.dataflow.ruby.xee_injection

XML External Entity Injection

Abstract
외부 엔터티 확인을 방지 또는 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML 외부 엔터티 공격에 노출될 수 있습니다.
Explanation
XML 외부 엔터티 공격에서는 XML 기능을 활용하여 처리 시점에 동적으로 문서를 구성합니다. XML 엔터티를 사용하면 지정된 리소스에서 동적으로 데이터를 포함할 수 있습니다. 외부 엔터티를 사용하면 XML 문서에 외부 URI의 데이터를 포함할 수 있습니다. 다른 방식으로 처리하도록 구성하지 않은 경우 외부 엔터티는 XML 파서가 URI로 지정된 리소스(예: 로컬 컴퓨터 또는 원격 시스템의 파일)를 접근하게 만듭니다. 이 동작으로 인해 응용 프로그램이 XXE(XML 외부 엔터티) 공격에 노출되고, 로컬 시스템에서 서비스 거부(DoS)를 발생시키고, 로컬 컴퓨터의 파일에 무단으로 접근, 원격 컴퓨터를 스캔하고, 원격 시스템에서 서비스 거부(DoS)를 발생시킬 수 있습니다.

다음 ABAP 코드는 안전하지 않은 XML 구문 분석을 보여줍니다.

...
DATA(ixml) = cl_ixml=>create( ).
DATA(stream_factory) = ixml->create_stream_factory( ).
istream = stream_factory->create_istream_string(
  `<?xml version="1.0" encoding="UTF-8"?> ` &&
  `<!DOCTYPE foo [ <!ENTITY xxe SYSTEM "file:///etc/passwd"> ]> ` &&
  `<stockCheck>&xxe;</stockCheck>` ).
istream->set_dtd_restriction( level = 0 ).
DATA(document) = ixml->create_document( ).
parser = ixml->create_parser(
                          stream_factory = stream_factory
                          istream        = istream
                          document       = document ).
parser->set_validating( mode = `0` ).
DATA(rc) = parser->parse( ).
...


이 예제에서는 XML 파서가 엔터티를 파일의 내용으로 대체하려고 하면 Linux 시스템에서 '/etc/passwd' 비밀번호 파일의 내용이 노출될 수 있습니다.
References
[1] XML Denial of Service Attacks and Defenses MSDN Magazine
[2] XML External Entity (XXE) Processing OWASP
[3] Testing for XML Injection OWASP
[4] XML External Entities The Web Application Security Consortium
[5] Standards Mapping - Common Weakness Enumeration CWE ID 611
[6] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[7] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[8] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[9] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[10] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[11] Standards Mapping - FIPS200 SI
[12] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[13] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[14] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[15] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[16] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[17] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[18] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[19] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[20] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[21] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[22] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[23] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[24] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[25] Standards Mapping - OWASP Top 10 2010 A1 Injection
[26] Standards Mapping - OWASP Top 10 2013 A1 Injection
[27] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[28] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[34] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[35] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[36] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[37] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[38] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[39] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[40] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[41] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[61] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[62] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[63] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[64] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.dataflow.abap.xml_external_entity_injection
Abstract
외부 엔터티 확인을 방지 또는 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML 외부 엔터티 공격에 노출될 수 있습니다.
Explanation
XML 외부 엔터티 공격에서는 XML 기능을 활용하여 처리 시점에 동적으로 문서를 구성합니다. XML 엔터티를 사용하면 지정된 리소스에서 동적으로 데이터를 포함할 수 있습니다. 외부 엔터티를 사용하면 XML 문서에 외부 URI의 데이터를 포함할 수 있습니다. 다른 방식으로 처리하도록 구성하지 않는 한 외부 엔터티는 XML 파서가 URI로 지정된 리소스(예: 로컬 컴퓨터 또는 원격 시스템의 파일)에 접근하게 만듭니다. 이 동작으로 인해 응용 프로그램이 XML 외부 엔터티(XXE) 공격에 노출되고, 이를 통해 로컬 시스템에서 denial of service를 발생시키고, 로컬 컴퓨터의 파일에 무단으로 접근, 원격 컴퓨터를 스캔하고, 원격 시스템에서 denial of service를 발생시킬 수 있습니다.

다음 XML 문서에서는 XXE 공격의 예를 보여 줍니다.

<?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
  <!ELEMENT foo ANY >
  <!ENTITY xxe SYSTEM "file:///c:/winnt/win.ini" >]><foo>&xxe;</foo>


이 예제에서 XML 파서가 엔터티를 파일의 내용으로 대체하려고 하면 C:\winnt\win.ini 시스템 파일의 내용이 노출될 수 있습니다.
References
[1] XML Denial of Service Attacks and Defenses MSDN Magazine
[2] XML External Entity (XXE) Processing OWASP
[3] Testing for XML Injection OWASP
[4] XML External Entities The Web Application Security Consortium
[5] Standards Mapping - Common Weakness Enumeration CWE ID 611
[6] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[7] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[8] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[9] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[10] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[11] Standards Mapping - FIPS200 SI
[12] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[13] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[14] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[15] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[16] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[17] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[18] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[19] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[20] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[21] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[22] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[23] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[24] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[25] Standards Mapping - OWASP Top 10 2010 A1 Injection
[26] Standards Mapping - OWASP Top 10 2013 A1 Injection
[27] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[28] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[34] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[35] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[36] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[37] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[38] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[39] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[40] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[41] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[61] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[62] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[63] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[64] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.controlflow.dotnet.xml_external_entity_injection
Abstract
식별된 메서드는 외부 엔터티 참조를 허용합니다. 이 호출을 사용하면 공격자는 XML 문서에 XML 외부 엔터티를 삽입하여 파일이나 내부 네트워크 리소스의 내용을 노출할 수 있습니다.
Explanation
XXE(XML 외부 엔터티) 삽입은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. 데이터는 XML 문서 내 DTD(Document Type Definition)의 <ENTITY> 요소에 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 경우 공격자는 중첩된 엔터티 참조를 삽입하고 XML 파서가 점점 더 많은 CPU 리소스를 소모하도록 할 수 있습니다. 더 악의적인 XML 외부 엔터티 injection의 경우 공격자가 로컬 파일 시스템 리소스의 내용을 노출하거나 내부 네트워크 리소스의 존재를 알리는 XML 요소를 추가할 수 있습니다.

예제 1:다음은 XXE 공격에 취약한 일부 Objective-C 코드입니다.


- (void) parseSomeXML: (NSString *) rawXml {

    BOOL success;
    NSData *rawXmlConvToData = [rawXml dataUsingEncoding:NSUTF8StringEncoding];
    NSXMLParser *myParser = [[NSXMLParser alloc] initWithData:rawXmlConvToData];
    [myParser setShouldResolveExternalEntities:YES];
    [myParser setDelegate:self];
}


XML이 다음과 유사한 rawXml 콘텐트를 공격자가 제어할 수 있다고 가정해 보겠습니다.


 <?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
   <!ELEMENT foo ANY >
   <!ENTITY xxe SYSTEM "file:///c:/boot.ini" >]><foo>&xxe;</foo>


XML이 서버에 의해 평가될 때 <foo> 요소에 boot.ini 파일의 내용이 포함됩니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 611
[2] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[3] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[4] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[5] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[7] Standards Mapping - FIPS200 SI
[8] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[9] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[10] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[11] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[12] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[13] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[14] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[15] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[16] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[17] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[18] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[19] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[20] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[21] Standards Mapping - OWASP Top 10 2010 A1 Injection
[22] Standards Mapping - OWASP Top 10 2013 A1 Injection
[23] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[24] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[34] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[35] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[36] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[37] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.semantic.cpp.xml_external_entity_injection
Abstract
외부 엔터티 확인을 방지 또는 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML 외부 엔터티 공격에 노출될 수 있습니다.
Explanation
XML 외부 엔터티 공격에서는 XML 기능을 활용하여 처리 시점에 동적으로 문서를 구성합니다. XML 엔터티를 사용하면 지정된 리소스에서 동적으로 데이터를 포함시킬 수 있습니다. 외부 엔터티를 사용하면 XML 문서에 외부 URI의 데이터를 포함할 수 있습니다. 다른 방식으로 처리하도록 구성하지 않은 경우 외부 엔터티는 XML 파서가 URI로 지정된 리소스(예: 로컬 컴퓨터 또는 원격 시스템의 파일)를 접근하게 만듭니다. 이 동작으로 인해 응용 프로그램이 XML 외부 엔터티(XXE) 공격에 노출되고, 이를 통해 로컬 시스템에서 denial of service를 발생시키고, 로컬 컴퓨터의 파일에 무단으로 접근하고, 원격 컴퓨터를 스캔하고, 원격 시스템에서 denial of service를 발생시킬 수 있습니다.
예제 1: 다음 XML 문서는 XXE 공격의 예를 보여줍니다.

<?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
  <!ELEMENT foo ANY >
  <!ENTITY xxe SYSTEM "file:///dev/random" >]><foo>&xxe;</foo>


이 예제에서 XML 파서가 엔터티를 /dev/random 파일의 컨텐츠로 대체하려고 시도하는 경우 서버가 중단될 수 있습니다(UNIX 시스템의 경우).

예제 2: 다음 Java 코드는 XML 파서를 악용하여 XXE 공격을 실행하는 방법을 보여줍니다.

String xml = "...";
...
try {
    SAXParserFactory factory = SAXParserFactory.newInstance();
    SAXParser saxParser = factory.newSAXParser();

    DefaultHandler handler = new DefaultHandler() {
        @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            System.out.println(new String(ch, start, length));
        }
    };

    saxParser.parse(new InputSource(new StringReader(xml)), handler);
} catch (Exception e) {
    e.printStackTrace();
}
...

이 예제에서 Java 코드는 외부 엔터티 참조가 있는 XML 문자열을 사용합니다. 외부 엔터티 확인을 비활성화하도록 적절히 구성하지 않으면 UNIX 시스템에서 서버가 충돌할 수 있습니다.
References
[1] XML External Entity (XXE) Processing OWASP
[2] Testing for XML Injection OWASP
[3] XML External Entities The Web Application Security Consortium
[4] IDS17-J. Prevent XML External Entity Attacks CERT
[5] DOS-1: Beware of activities that may use disproportionate resources Oracle
[6] INJECT-5: Restrict XML inclusion Oracle
[7] Standards Mapping - Common Weakness Enumeration CWE ID 611
[8] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[9] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[10] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[11] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[12] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[13] Standards Mapping - FIPS200 SI
[14] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[15] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[16] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[17] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[18] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[19] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[20] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[21] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[22] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[23] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[24] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[25] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[26] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[27] Standards Mapping - OWASP Top 10 2010 A1 Injection
[28] Standards Mapping - OWASP Top 10 2013 A1 Injection
[29] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[30] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[34] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[35] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[36] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[37] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[38] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[39] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[40] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[41] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[42] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[43] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[61] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[62] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[63] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[64] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[65] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[66] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.semantic.java.xxe_injection
Abstract
외부 엔터티 확인을 방지 또는 제한하지 않는 XML 프로세서를 사용하면 응용 프로그램이 XML 외부 엔터티 공격에 노출될 수 있습니다.
Explanation
XML 외부 엔터티 공격에서는 XML 기능을 활용하여 런타임 시 동적으로 문서를 작성합니다. XML 엔터티를 사용하면 지정된 리소스에서 동적으로 데이터를 포함시킬 수 있습니다. 외부 엔터티를 사용하면 XML 문서에 외부 URI의 데이터를 포함할 수 있습니다. 다른 방식으로 처리하도록 구성하지 않은 경우 외부 엔터티는 XML 파서가 URI로 지정된 리소스(예: 로컬 컴퓨터 또는 원격 시스템의 파일)를 접근하게 만듭니다. 이 동작으로 인해 응용 프로그램이 XXE(XML 외부 엔터티) 공격에 노출되고, 공격자는 로컬 시스템에서 DoS(Denial of Service)를 발생시키고, 로컬 컴퓨터의 파일에 무단으로 접근, 원격 컴퓨터를 스캔하고, 원격 시스템에서 DoS(Denial of Service)를 발생시킬 수 있습니다.


예제 1: 다음 XML 문서는 XXE 공격의 예를 보여줍니다.

<?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
  <!ELEMENT foo ANY >
  <!ENTITY xxe SYSTEM "file:///dev/random" >]><foo>&xxe;</foo>


이 예제에서는 XML 파서가 엔터티를 /dev/random 파일의 내용으로 대체하려고 시도하는 경우 서버(UNIX 시스템에서)가 중단될 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 611
[2] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[3] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[4] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[5] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[7] Standards Mapping - FIPS200 SI
[8] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[9] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[10] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[11] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[12] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[13] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[14] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[15] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[16] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[17] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[18] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[19] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[20] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[21] Standards Mapping - OWASP Top 10 2010 A1 Injection
[22] Standards Mapping - OWASP Top 10 2013 A1 Injection
[23] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[24] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[34] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[35] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[36] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[37] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.dataflow.javascript.xxe_injection
Abstract
식별된 메서드는 외부 엔터티 참조를 허용합니다. 이 호출을 사용하면 공격자는 XML 문서에 XML 외부 엔터티를 삽입하여 파일이나 내부 네트워크 리소스의 내용을 노출할 수 있습니다.
Explanation
XXE(XML 외부 엔터티) 삽입은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. 데이터는 XML 문서에서 DTD(Document Type Definition)의 <ENTITY> 요소에 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 경우 공격자는 중첩된 엔터티 참조를 삽입하고 XML 파서가 점점 더 많은 CPU 리소스를 소모하도록 할 수 있습니다. 더 악의적인 XML 외부 엔터티 injection의 경우 공격자가 로컬 파일 시스템 리소스의 내용을 노출하거나 내부 네트워크 리소스의 존재를 알리는 XML 요소를 추가할 수 있습니다.

예제 1:다음은 XXE 공격에 취약한 일부 코드입니다.


- (void) parseSomeXML: (NSString *) rawXml {

    BOOL success;
    NSData *rawXmlConvToData = [rawXml dataUsingEncoding:NSUTF8StringEncoding];
    NSXMLParser *myParser = [[NSXMLParser alloc] initWithData:rawXmlConvToData];
    [myParser setShouldResolveExternalEntities:YES];
    [myParser setDelegate:self];
}


XML이 다음과 유사한 rawXml 콘텐트를 공격자가 제어할 수 있다고 가정해 보겠습니다.


 <?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
   <!ELEMENT foo ANY >
   <!ENTITY xxe SYSTEM "file:///c:/boot.ini" >]><foo>&xxe;</foo>


XML이 서버에 의해 평가될 때 <foo> 요소에 boot.ini 파일의 내용이 포함됩니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 611
[2] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[3] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[4] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[5] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[7] Standards Mapping - FIPS200 SI
[8] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[9] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[10] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[11] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[12] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[13] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[14] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[15] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[16] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[17] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[18] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[19] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[20] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[21] Standards Mapping - OWASP Top 10 2010 A1 Injection
[22] Standards Mapping - OWASP Top 10 2013 A1 Injection
[23] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[24] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[34] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[35] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[36] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[37] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.semantic.objc.xml_external_entity_injection
Abstract
확인되지 않은 XML 문서를 처리하면 공격자가 XML의 구조 및 내용을 변경하거나, 호스트 서버를 포트 스캔하거나, 내부 네트워크를 호스트 스캔하거나, 파일 시스템에서 임의의 파일을 포함하거나, 응용 프로그램에서 Denial Of Service(DoS)를 일으킬 수 있습니다.
Explanation
XXE(XML 외부 엔터티) 삽입은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우 공격자는 중첩된 엔터티 참조를 삽입하고 XML 파서가 점점 더 많은 CPU 리소스를 소모하도록 할 수 있습니다. 더 악의적인 XML 외부 엔터티 injection의 경우 공격자가 로컬 파일 시스템 리소스의 내용을 노출하거나 내부 네트워크 리소스의 존재를 알리거나 백엔드 콘텐트 자체를 노출하는 XML 요소를 추가할 수 있습니다.

예제 1:다음은 XXE 공격에 취약한 일부 코드입니다.

공격자는 다음과 같은 코드에 대한 입력 XML을 제어할 수 있다고 가정합니다.


...
<?php
$goodXML = $_GET["key"];
$doc = simplexml_load_string($goodXml);
echo $doc->testing;
?>
...


이제 다음 XML이 공격자에 의해 Example 2의 코드에 전달된다고 가정해 봅니다.



<?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
   <!ELEMENT foo ANY >
   <!ENTITY xxe SYSTEM "file:///c:/boot.ini" >]><foo>&xxe;</foo>



XML이 처리될 때 <foo> 요소의 내용이 시스템 boot.ini 파일의 내용으로 채워집니다. 공격자는 클라이언트에 반환된 XML 요소를 활용하여 데이터를 몰래 내보내거나 네트워크 리소스의 존재에 관한 정보를 얻을 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 611
[2] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[3] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[4] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[5] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[7] Standards Mapping - FIPS200 SI
[8] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[9] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[10] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[11] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[12] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[13] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[14] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[15] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[16] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[17] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[18] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[19] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[20] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[21] Standards Mapping - OWASP Top 10 2010 A1 Injection
[22] Standards Mapping - OWASP Top 10 2013 A1 Injection
[23] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[24] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[34] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[35] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[36] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[37] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.dataflow.php.xml_external_entity_injection
Abstract
외부 엔터티 확인을 방지하거나 제한하지 않는 XML 프로세서를 사용하면 응용 프로그램이 XML 외부 엔터티 공격에 노출될 수 있습니다.
Explanation
XML 외부 엔터티 공격에서는 XML 기능을 활용하여 런타임 시 동적으로 문서를 작성합니다. XML 엔터티를 사용하면 지정된 리소스에서 동적으로 데이터를 포함시킬 수 있습니다. 외부 엔터티를 사용하면 XML 문서에 외부 URI의 데이터를 포함할 수 있습니다. 다른 방식으로 처리하도록 구성하지 않은 경우 외부 엔터티는 XML 파서가 URI로 지정된 리소스(예: 로컬 컴퓨터 또는 원격 시스템의 파일)를 접근하게 만듭니다. 이 동작으로 인해 응용 프로그램이 XXE(XML 외부 엔터티) 공격에 노출되고, 공격자는 이를 사용하여 로컬 시스템에서 Denial of Service를 발생시키고, 로컬 컴퓨터의 파일에 무단으로 접근, 원격 컴퓨터를 스캔하고, 원격 시스템에서 Denial of Service를 발생시킬 수 있습니다.


예제 1: 다음 XML 문서는 XXE 공격의 예를 보여 줍니다.

<?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
  <!ELEMENT foo ANY >
  <!ENTITY xxe SYSTEM "file:///dev/random" >]><foo>&xxe;</foo>


이 예제에서 XML 파서가 엔터티를 /dev/random 파일의 컨텐츠로 대체하려고 시도하는 경우 서버가 중단될 수 있습니다(UNIX 시스템의 경우).
References
[1] XML vulnerabilities
[2] Announcing defusedxml, Fixes for XML Security Issues
[3] defusedxml
[4] defusedexpat
[5] XML External Entity (XXE) Processing OWASP
[6] Testing for XML Injection (OWASP-DV-008) OWASP
[7] XML External Entities The Web Application Security Consortium
[8] Standards Mapping - Common Weakness Enumeration CWE ID 611
[9] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[10] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[11] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[12] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[13] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[14] Standards Mapping - FIPS200 SI
[15] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[16] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[17] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[18] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[19] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[20] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[21] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[22] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[23] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[24] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[25] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[26] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[27] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[28] Standards Mapping - OWASP Top 10 2010 A1 Injection
[29] Standards Mapping - OWASP Top 10 2013 A1 Injection
[30] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[31] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[34] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[35] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[36] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[37] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[38] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[39] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[40] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[41] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[42] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[43] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[44] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[61] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[62] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[63] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[64] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[65] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[66] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[67] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.dataflow.python.xxe_injection
Abstract
외부 엔터티 확인을 방지 또는 제한하도록 구성되지 않은 XML 파서를 사용하면 파서가 XML 외부 엔터티 공격에 노출될 수 있습니다.
Explanation
XML 외부 엔터티 공격에서는 XML 기능을 활용하여 처리 시점에 동적으로 문서를 구성합니다. XML 엔터티를 사용하면 지정된 리소스에서 동적으로 데이터를 포함시킬 수 있습니다. 외부 엔터티를 사용하면 XML 문서에 외부 URI의 데이터를 포함할 수 있습니다. 다른 방식으로 처리하도록 구성하지 않은 경우 외부 엔터티는 XML 파서가 URI로 지정된 리소스(예: 로컬 컴퓨터 또는 원격 시스템의 파일)를 접근하게 만듭니다. 이 동작으로 인해 응용 프로그램이 XML 외부 엔터티(XXE) 공격에 노출되고, 이를 통해 로컬 시스템에서 denial of service를 발생시키고, 로컬 컴퓨터의 파일에 무단으로 접근하고, 원격 컴퓨터를 스캔하고, 원격 시스템에서 denial of service를 발생시킬 수 있습니다.

다음 XML 문서에서는 XXE 공격의 예를 보여 줍니다.

<?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
  <!ELEMENT foo ANY >
  <!ENTITY xxe SYSTEM "file:///etc/passwd" >]><foo>&xxe;</foo>


예제 XML 문서는 /etc/passwd의 내용을 읽어 문서에 이 내용을 포함합니다.

예제 1: 다음 코드는 HTTP 요청의 신뢰할 수 없는 입력을 처리하기 위해 안전하지 않은 XML 파서를 사용합니다. 


def readFile() = Action { request =>
    val xml = request.cookies.get("doc")
    val doc = XMLLoader.loadString(xml)
    ...
}
References
[1] XML External Entity (XXE) Processing OWASP
[2] Testing for XML Injection OWASP
[3] XML External Entities The Web Application Security Consortium
[4] IDS17-J. Prevent XML External Entity Attacks CERT
[5] DOS-1: Beware of activities that may use disproportionate resources Oracle
[6] INJECT-5: Restrict XML inclusion Oracle
[7] Standards Mapping - Common Weakness Enumeration CWE ID 611
[8] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[9] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[10] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[11] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[12] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[13] Standards Mapping - FIPS200 SI
[14] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[15] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[16] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[17] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[18] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[19] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[20] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[21] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[22] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[23] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[24] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[25] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[26] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[27] Standards Mapping - OWASP Top 10 2010 A1 Injection
[28] Standards Mapping - OWASP Top 10 2013 A1 Injection
[29] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[30] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[34] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[35] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[36] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[37] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[38] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[39] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[40] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[41] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[42] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[43] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[61] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[62] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[63] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[64] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[65] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[66] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.dataflow.scala.xml_external_entity_injection
Abstract
식별된 메서드는 외부 엔터티 참조를 허용합니다. 이 호출을 사용하면 공격자는 XML 문서에 XML 외부 엔터티를 삽입하여 파일이나 내부 네트워크 리소스의 내용을 노출할 수 있습니다.
Explanation
XXE(XML 외부 엔터티) 삽입은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. 데이터는 XML 문서 내 DTD(Document Type Definition)의 <ENTITY> 요소에 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 경우 공격자는 중첩된 엔터티 참조를 삽입하고 XML 파서가 점점 더 많은 CPU 리소스를 소모하도록 할 수 있습니다. 더 악의적인 XML 외부 엔터티 injection의 경우 공격자가 로컬 파일 시스템 리소스의 내용을 노출하거나 내부 네트워크 리소스의 존재를 알리는 XML 요소를 추가할 수 있습니다.

예제 1:다음은 XXE 공격에 취약한 일부 코드입니다.


func parseXML(xml: String) {
    parser = NSXMLParser(data: rawXml.dataUsingEncoding(NSUTF8StringEncoding)!)
    parser.delegate = self
    parser.shouldResolveExternalEntities = true
    parser.parse()
}


XML이 다음과 유사한 rawXml 콘텐트를 공격자가 제어할 수 있다고 가정해 보겠습니다.


 <?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
   <!ELEMENT foo ANY >
   <!ENTITY xxe SYSTEM "file:///c:/boot.ini" >]><foo>&xxe;</foo>


XML이 서버에 의해 평가될 때 <foo> 요소에 boot.ini 파일의 내용이 포함됩니다.
References
[1] XML External Entity (XXE) Processing OWASP
[2] Testing for XML Injection OWASP
[3] XML External Entities The Web Application Security Consortium
[4] Standards Mapping - Common Weakness Enumeration CWE ID 611
[5] Standards Mapping - Common Weakness Enumeration Top 25 2019 [17] CWE ID 611
[6] Standards Mapping - Common Weakness Enumeration Top 25 2020 [19] CWE ID 611
[7] Standards Mapping - Common Weakness Enumeration Top 25 2021 [23] CWE ID 611
[8] Standards Mapping - Common Weakness Enumeration Top 25 2022 [24] CWE ID 611
[9] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385, CCI-002754
[10] Standards Mapping - FIPS200 SI
[11] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[12] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[13] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[14] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[15] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[16] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)
[17] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation
[18] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.5.2 Deserialization Prevention Requirements (L1 L2 L3)
[19] Standards Mapping - OWASP Mobile 2014 M4 Unintended Data Leakage
[20] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[21] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-STORAGE-2
[22] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[23] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[24] Standards Mapping - OWASP Top 10 2010 A1 Injection
[25] Standards Mapping - OWASP Top 10 2013 A1 Injection
[26] Standards Mapping - OWASP Top 10 2017 A4 XML External Entities (XXE)
[27] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[33] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[34] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[35] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[36] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[37] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[38] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[39] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2.2 - Web Software Attack Mitigation
[40] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[59] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[60] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[61] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[62] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[63] Standards Mapping - Web Application Security Consortium Version 2.00 XML External Entities (WASC-43)
desc.structural.swift.xml_external_entity_injection

XML Injection

Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다.
Explanation
XML injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스의 데이터가 프로그램에 입력됩니다.

2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 중요한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 중요한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


ABAP iXML 파서를 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 오버라이드합니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.abap.xml_injection
Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
   <price>100.00</price>
   <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 덮어씁니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.dotnet.xml_injection
Abstract
식별된 메서드는 확인되지 않은 XML 입력을 작성합니다. 이 호출로 공격자는 XML 문서에 임의의 요소나 속성을 삽입할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.


2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 덮어씁니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.cpp.xml_injection
Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스의 데이터가 프로그램에 입력됩니다.

2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 중요한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 중요한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 오버라이드합니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.golang.xml_injection
Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 덮어씁니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] IDS16-J. Prevent XML Injection CERT
[2] INJECT-3: XML and HTML generation requires care Oracle
[3] Standards Mapping - Common Weakness Enumeration CWE ID 91
[4] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[5] Standards Mapping - FIPS200 SI
[6] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[9] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[10] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[11] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[12] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[13] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[14] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[15] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[16] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[17] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[18] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[19] Standards Mapping - OWASP Top 10 2010 A1 Injection
[20] Standards Mapping - OWASP Top 10 2013 A1 Injection
[21] Standards Mapping - OWASP Top 10 2017 A1 Injection
[22] Standards Mapping - OWASP Top 10 2021 A03 Injection
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[33] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[34] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[35] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.java.xml_injection
Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.


2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.javascript.xml_injection
Abstract
식별된 메서드는 확인되지 않은 XML 입력을 작성합니다. 이 호출로 공격자는 XML 문서에 임의의 요소나 속성을 삽입할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.


2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 덮어씁니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.objc.xml_injection
Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


XML 파서를 사용할 경우 두 번째 <price>의 값이 첫 번째 <price> 태그의 값을 덮어씁니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.


이 공격의 좀 더 심각한 형태인 XXE(XML 외부 엔터티) injection은 공격자가 구문 분석된 XML 문서의 앞 부분 또는 전체를 제어하는 경우에 발생할 수 있습니다.

예제 2:다음은 XXE 공격에 취약한 일부 코드입니다.

공격자는 다음과 같은 코드에 대한 입력 XML을 제어할 수 있다고 가정합니다.


...
<?php
$goodXML = $_GET["key"];
$doc = simplexml_load_string($goodXml);
echo $doc->testing;
?>
...


이제 다음 XML이 공격자에 의해 Example 2의 코드에 전달된다고 가정해 봅니다.



<?xml version="1.0" encoding="ISO-8859-1"?>
 <!DOCTYPE foo [
   <!ELEMENT foo ANY >
   <!ENTITY xxe SYSTEM "file:///c:/boot.ini" >]><foo>&xxe;</foo>



XML이 처리될 때 <foo> 요소의 내용이 시스템 boot.ini 파일의 내용으로 채워집니다. 공격자는 클라이언트에 반환된 XML 요소를 활용하여 데이터를 몰래 내보내거나 네트워크 리소스의 존재에 관한 정보를 얻을 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.php.xml_injection
Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
    <price>100.00</price>
    <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 덮어씁니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.python.xml_injection
Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다. 검증되지 않은 XML을 구문 분석하면 Denial of Service, 중요한 정보의 노출 및 원격 코드 실행이 발생할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. 데이터가 XML 문서에 작성되거나 XML로 구문 분석됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
    <price>100.00</price>
    <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 덮어씁니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Introduction to Software Security: XML Injection Atacks University of Wisconsin-Madison
[2] Exploitation: XML External Entity (XXE) Injection Depth Security
[3] Standards Mapping - Common Weakness Enumeration CWE ID 91
[4] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[5] Standards Mapping - FIPS200 SI
[6] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[9] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[10] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[11] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[12] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[13] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[14] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[15] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[16] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[17] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[18] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[19] Standards Mapping - OWASP Top 10 2010 A1 Injection
[20] Standards Mapping - OWASP Top 10 2013 A1 Injection
[21] Standards Mapping - OWASP Top 10 2017 A1 Injection
[22] Standards Mapping - OWASP Top 10 2021 A03 Injection
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[33] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[34] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[35] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.ruby.xml_injection
Abstract
확인되지 않은 데이터를 XML 문서에 쓰면 공격자가 XML의 구조와 내용을 변경할 수 있습니다. 검증되지 않은 XML을 구문 분석하면 Denial of Service, 중요한 정보의 노출 및 원격 코드 실행이 발생할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. 데이터가 XML 문서에 작성되거나 XML로 구문 분석됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 중요한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 중요한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 재정의합니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] IDS16-J. Prevent XML Injection CERT
[2] INJECT-3: XML and HTML generation requires care Oracle
[3] Standards Mapping - Common Weakness Enumeration CWE ID 91
[4] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[5] Standards Mapping - FIPS200 SI
[6] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[9] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[10] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[11] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[12] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[13] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[14] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[15] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[16] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[17] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[18] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[19] Standards Mapping - OWASP Top 10 2010 A1 Injection
[20] Standards Mapping - OWASP Top 10 2013 A1 Injection
[21] Standards Mapping - OWASP Top 10 2017 A1 Injection
[22] Standards Mapping - OWASP Top 10 2021 A03 Injection
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[33] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[34] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[35] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[57] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[58] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.scala.xml_injection
Abstract
식별된 메서드는 확인되지 않은 XML 입력을 작성합니다. 이 호출로 공격자는 XML 문서에 임의의 요소나 속성을 삽입할 수 있습니다.
Explanation
XML injection은 다음과 같은 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.


2. XML 문서에 데이터가 작성됩니다.

일반적으로 응용 프로그램은 XML을 사용하여 데이터를 저장하거나 메시지를 전송합니다. 데이터를 저장하는 데 사용할 경우, XML 문서는 주로 데이터베이스와 같이 다뤄지며 민감한 정보를 포함할 수 있습니다. XML 메시지는 주로 웹 서비스에서 사용하며 민감한 정보를 전송하는 데에도 사용할 수 있습니다. XML 메시지는 인증 자격 증명을 전송하는 데 사용할 수도 있습니다.

공격자가 원시 XML을 작성할 수 있는 경우, XML 문서 및 메시지의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML injection의 경우 공격자는 인증 자격 증명을 변경하거나 XML 전자상거래 데이터베이스에서 가격을 수정하는 XML 요소를 추가할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 XML에서 공격자가 shoes를 제어할 수 있다고 가정합니다.

<order>
   <price>100.00</price>
   <item>shoes</item>
</order>


이제 이 XML이 신발 한 켤레를 주문하는 백엔드(back end) 웹 서비스 요청에 포함됨을 가정해 보십시오. 공격자가 요청을 수정하고 shoes를 shoes</item><price>1.00</price><item>shoes로 대체한다고 가정합니다. 새 XML은 다음과 같습니다.

<order>
    <price>100.00</price>
    <item>shoes</item><price>1.00</price><item>shoes</item>
</order>


SAX 구문 분석을 사용할 때, 두 번째 <price>의 값은 첫 번째 <price> 태그의 값을 덮어씁니다. 그러면 공격자는 한 켤레에 $100인 신발을 $1에 구입할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.swift.xml_injection

XML Injection: Open XML

Abstract
확인되지 않은 데이터를 Open XML 문서에 쓰면 공격자가 기본 XML의 구조와 내용을 변경할 수 있습니다.
Explanation
XML Injection: 다음과 같은 경우 Open XML이 발생합니다.

1. 신뢰할 수 없는 소스의 데이터가 프로그램에 입력됩니다.


2. Open XML 문서에 데이터가 작성됩니다.

Open XML 문서는 일반적으로 다른 사람에게 제공할 정보를 저장하는 데 사용되며 민감한 정보를 포함하는 경우가 많습니다.

공격자가 원시 XML을 작성할 수 있는 경우, Open XML 문서의 의미를 변경할 수 있습니다. 대부분의 양호한 경우, 공격자는 외부에서 발생한 태그를 삽입할 수 있고 이로 인해 Open XML 파서에 예외가 발생할 수 있습니다. 더 악의적인 XML Injection의 경우 공격자는 중요 정보를 지정하는 XML 요소를 수정, 추가 또는 제거할 수 있습니다. XML injection이 Cross-Site Scripting 또는 Dynamic Code Evaluation을 유발하는 경우도 있습니다.

예제 1:

다음 Open XML 문서에서 a:t 태그를 공격자가 제어할 수 있다고 가정해 보겠습니다.

<a:t>YoY results: up 10%</a:t>


이제 이 XML이 회사가 주주에게 제공하는 Powerpoint 프레젠테이션에 포함되어 있다고 가정해 봅니다. 이 경우, 회사는 고객용 사이트에 문서를 업로드할 수 있는 서비스를 보유하고 있으며, 해당 사이트에는 XML injection 취약점이 있습니다. 공격자가 “전년 대비 결과: 10% 감소”로 표시되도록 문서를 수정한다고 가정해 보겠습니다. 이 중요한 업데이트로 회사의 주가가 크게 변동할 수 있습니다. 수정 없이도 이 기밀 정보가 공개 정보로 전환되기 전에 여기에 액세스할 수 있는 사용자는 주식 시장에서 내부자 거래와 유사하게 이 정보를 활용할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 91
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[9] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[11] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[12] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[13] Standards Mapping - OWASP Top 10 2010 A1 Injection
[14] Standards Mapping - OWASP Top 10 2013 A1 Injection
[15] Standards Mapping - OWASP Top 10 2017 A1 Injection
[16] Standards Mapping - OWASP Top 10 2021 A03 Injection
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3810 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3810 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3810 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3810 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3810 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3810 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Web Application Security Consortium Version 2.00 XML Injection (WASC-23)
desc.dataflow.dotnet.xml_injection_open_xml

XPath Injection

Abstract
사용자 입력을 받아 동적으로 XPath 쿼리를 생성하면 공격자가 해당 문의 의미를 수정할 수 있습니다.
Explanation
XPath injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.



2. 데이터를 사용하여 XPath 쿼리를 동적으로 생성합니다.

예제 1: 다음 코드는 주어진 계정 ID의 전자 메일 주소를 검색하는 XPath 쿼리를 동적으로 구성 및 실행합니다. 계정 ID는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


...
string acctID = Request["acctID"];
string query = null;
if(acctID != null) {
       StringBuffer sb = new StringBuffer("/accounts/account[acctID='");
       sb.append(acctID);
       sb.append("']/email/text()");
       query = sb.toString();
}

XPathDocument docNav = new XPathDocument(myXml);
XPathNavigator nav = docNav.CreateNavigator();
nav.Evaluate(query);
...


계정 번호 1에 속하는 전자 메일 주소를 검색하는 등 일반적인 조건에서는 이 코드가 실행하는 쿼리가 다음과 유사합니다.

/accounts/account[acctID='1']/email/text()

하지만 상수인 기본 쿼리 문자열과 사용자 입력 문자열을 연결하여 쿼리를 동적으로 생성하기 때문에, 쿼리는 acctID에 작은따옴표가 들어 있지 않은 경우에만 정확하게 동작합니다. 공격자가 acctID에 1' or '1' = '1 문자열을 입력하면 쿼리는 다음과 같습니다.

/accounts/account[acctID='1' or '1' = '1']/email/text()1' or '1' = '1 조건을 추가하면 where 절이 항상 true로 평가하기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//email/text()

공격자는 이렇게 쿼리를 단순화하여 쿼리가 인증된 사용자가 소유한 항목만 반환해야 한다는 요구 사항을 무시할 수 있습니다. 이제 쿼리는 지정된 소유자와 관계없이 문서에 저장된 모든 전자 메일 주소를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 643
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.1 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XPath Injection (WASC-39)
[57] Standards Mapping - Web Application Security Consortium 24 + 2 XPath Injection
desc.dataflow.dotnet.xpath_injection
Abstract
식별된 메서드는 확인되지 않은 입력을 사용하여 만들어진 XPath 쿼리를 호출합니다. 이 호출을 사용하여 공격자는 해당 문의 의미를 수정하거나 임의의 XPath 쿼리를 실행할 수 있습니다.
Explanation
XPath injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.




2. 데이터를 사용하여 XPath 쿼리를 동적으로 생성합니다.

예제 1: C API를 호출하는 다음 Objective-C 코드는 주어진 계정 ID의 전자 메일 주소를 검색하는 XPath 쿼리를 동적으로 구성 및 실행합니다. 계정 ID는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


...
    NSString *accountStr = account.text;

    xmlXPathContextPtr xpathCtx;
    NSString *query = @"/accounts/account[actId='" + accountStr + @"']/email/text()";

    xpathCtx = xmlXPathNewContext(doc);

    /* Evaluate XPath expression */
    xmlChar *queryString =
        (xmlChar *)[query cStringUsingEncoding:NSUTF8StringEncoding];
    xpathObj = xmlXPathEvalExpression(queryString, xpathCtx);
...


계정 번호 1에 속하는 전자 메일 주소를 검색하는 등 일반적인 조건에서는 이 코드가 실행하는 쿼리가 다음과 유사합니다.

/accounts/account[acctID='1']/email/text()

하지만 상수인 기본 쿼리 문자열과 사용자 입력 문자열을 연결하여 쿼리를 동적으로 생성하기 때문에, 쿼리는 acctID에 작은따옴표가 들어 있지 않은 경우에만 정확하게 동작합니다. 공격자가 acctID에 1' or '1' = '1 문자열을 입력하면 쿼리는 다음과 같습니다.

/accounts/account[acctID='1' or '1' = '1']/email/text()1' or '1' = '1 조건을 추가하면 where 절이 항상 true로 평가하기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//email/text()

공격자는 이렇게 쿼리를 단순화하여 쿼리가 인증된 사용자가 소유한 항목만 반환해야 한다는 요구 사항을 무시할 수 있습니다. 이제 쿼리는 지정된 소유자와 관계없이 문서에 저장된 모든 전자 메일 주소를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 643
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.1 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XPath Injection (WASC-39)
[57] Standards Mapping - Web Application Security Consortium 24 + 2 XPath Injection
desc.dataflow.cpp.xpath_injection
Abstract
사용자 입력을 받아 동적으로 XPath 쿼리를 생성하면 공격자가 해당 문의 의미를 수정할 수 있습니다.
Explanation
XPath injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.



2. 데이터를 사용하여 XPath 쿼리를 동적으로 생성합니다.

예제 1: 다음 코드는 주어진 계정 ID의 전자 메일 주소를 검색하는 XPath 쿼리를 동적으로 구성 및 실행합니다. 계정 ID는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


query = "/accounts/account[acctID='" & url.acctID & "']/email/text()";
selectedElements = XmlSearch(myxmldoc, query);


계정 번호 1에 속하는 전자 메일 주소를 검색하는 등 일반적인 조건에서는 이 코드가 실행하는 쿼리가 다음과 유사합니다.

/accounts/account[acctID='1']/email/text()

하지만 상수인 기본 쿼리 문자열과 사용자 입력 문자열을 연결하여 쿼리를 동적으로 생성하기 때문에, 쿼리는 acctID에 작은따옴표가 들어 있지 않은 경우에만 정확하게 동작합니다. 공격자가 acctID에 1' or '1' = '1 문자열을 입력하면 쿼리는 다음과 같습니다.

/accounts/account[acctID='1' or '1' = '1']/email/text()1' or '1' = '1 조건을 추가하면 where 절이 항상 true로 평가하기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//email/text()

공격자는 이렇게 쿼리를 단순화하여 쿼리가 인증된 사용자가 소유한 항목만 반환해야 한다는 요구 사항을 무시할 수 있습니다. 이제 쿼리는 지정된 소유자와 관계없이 문서에 저장된 모든 전자 메일 주소를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 643
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.1 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XPath Injection (WASC-39)
[57] Standards Mapping - Web Application Security Consortium 24 + 2 XPath Injection
desc.dataflow.cfml.xpath_injection
Abstract
사용자 입력을 받아 동적으로 XPath 쿼리를 생성하면 공격자가 해당 문의 의미를 수정할 수 있습니다.
Explanation
XPath injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.



2. 데이터를 사용하여 XPath 쿼리를 동적으로 생성합니다.

예제 1: 다음 코드는 주어진 계정 ID의 전자 메일 주소를 검색하는 XPath 쿼리를 동적으로 구성 및 실행합니다. 계정 ID는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


...
String acctID = request.getParameter("acctID");
String query = null;
if(acctID != null) {
       StringBuffer sb = new StringBuffer("/accounts/account[acctID='");
       sb.append(acctID);
       sb.append("']/email/text()");
       query = sb.toString();
}

DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
Document doc = builder.parse("accounts.xml");
XPathFactory factory = XPathFactory.newInstance();
XPath xpath = factory.newXPath();
XPathExpression expr = xpath.compile(query);
Object result = expr.evaluate(doc, XPathConstants.NODESET);
...


계정 번호 1에 속하는 전자 메일 주소를 검색하는 등 일반적인 조건에서는 이 코드가 실행하는 쿼리가 다음과 유사합니다.

/accounts/account[acctID='1']/email/text()

하지만 상수인 기본 쿼리 문자열과 사용자 입력 문자열을 연결하여 쿼리를 동적으로 생성하기 때문에, 쿼리는 acctID에 작은따옴표가 들어 있지 않은 경우에만 정확하게 동작합니다. 공격자가 acctID에 1' or '1' = '1 문자열을 입력하면 쿼리는 다음과 같습니다.

/accounts/account[acctID='1' or '1' = '1']/email/text()1' or '1' = '1 조건을 추가하면 where 절이 항상 true로 평가하기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//email/text()

공격자는 이렇게 쿼리를 단순화하여 쿼리가 인증된 사용자가 소유한 항목만 반환해야 한다는 요구 사항을 무시할 수 있습니다. 이제 쿼리는 지정된 소유자와 관계없이 문서에 저장된 모든 전자 메일 주소를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 643
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.1 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XPath Injection (WASC-39)
[57] Standards Mapping - Web Application Security Consortium 24 + 2 XPath Injection
desc.dataflow.java.xpath_injection
Abstract
식별된 메서드는 확인되지 않은 입력을 사용하여 만들어진 XPath 쿼리를 호출합니다. 이 호출을 사용하여 공격자는 해당 문의 의미를 수정하거나 임의의 XPath 쿼리를 실행할 수 있습니다.
Explanation
XPath injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.




2. 데이터를 사용하여 XPath 쿼리를 동적으로 생성합니다.

예제 1: 다음 코드는 주어진 계정 ID의 전자 메일 주소를 검색하는 XPath 쿼리를 동적으로 구성 및 실행합니다. 계정 ID는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


...
    NSString *accountStr = account.text;

    xmlXPathContextPtr xpathCtx;
    NSString *query = @"/accounts/account[actId='" + accountStr + @"']/email/text()";

    xpathCtx = xmlXPathNewContext(doc);

    /* Evaluate XPath expression */
    xmlChar *queryString =
        (xmlChar *)[query cStringUsingEncoding:NSUTF8StringEncoding];
    xpathObj = xmlXPathEvalExpression(queryString, xpathCtx);
...


계정 번호 1에 속하는 전자 메일 주소를 검색하는 등 일반적인 조건에서는 이 코드가 실행하는 쿼리가 다음과 유사합니다.

/accounts/account[acctID='1']/email/text()

하지만 상수인 기본 쿼리 문자열과 사용자 입력 문자열을 연결하여 쿼리를 동적으로 생성하기 때문에, 쿼리는 acctID에 작은따옴표가 들어 있지 않은 경우에만 정확하게 동작합니다. 공격자가 acctID에 1' or '1' = '1 문자열을 입력하면 쿼리는 다음과 같습니다.

/accounts/account[acctID='1' or '1' = '1']/email/text()1' or '1' = '1 조건을 추가하면 where 절이 항상 true로 평가하기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//email/text()

공격자는 이렇게 쿼리를 단순화하여 쿼리가 인증된 사용자가 소유한 항목만 반환해야 한다는 요구 사항을 무시할 수 있습니다. 이제 쿼리는 지정된 소유자와 관계없이 문서에 저장된 모든 전자 메일 주소를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 643
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.1 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XPath Injection (WASC-39)
[57] Standards Mapping - Web Application Security Consortium 24 + 2 XPath Injection
desc.dataflow.objc.xpath_injection
Abstract
사용자 입력을 받아 동적으로 XPath 쿼리를 생성하면 공격자가 해당 문의 의미를 수정할 수 있습니다.
Explanation
XPath injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.



2. 데이터를 사용하여 XPath 쿼리를 동적으로 구성합니다.

예제 1: 다음 코드는 주어진 계정 ID의 전자 메일 주소를 검색하는 XPath 쿼리를 동적으로 구성 및 실행합니다. 계정 ID는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


...
<?php
load('articles.xml');
 
$xpath = new DOMXPath($doc);
$emailAddrs = $xpath->query(&quot;/accounts/account[acctID='&quot; . $_GET[&quot;test1&quot;] . &quot;']/email/text()&quot;);
//$arts = $xpath->evaluate(&quot;/accounts/account[acctID='&quot; . $_GET[&quot;test1&quot;] . &quot;']/email/text()&quot;)
 
foreach ($emailAddrs as $email)
{
    echo $email->nodeValue."";
}
	?>
...


계정 번호 1에 속하는 전자 메일 주소를 검색하는 등 일반적인 조건에서는 이 코드가 실행하는 쿼리가 다음과 유사합니다.

/accounts/account[acctID='1']/email/text()

하지만 상수 쿼리 문자열과 사용자 입력 문자열을 연결하여 쿼리를 동적으로 구성하기 때문에, 쿼리는 acctID에 작은따옴표가 들어 있지 않은 경우에만 정확하게 동작합니다. 공격자가 acctID에 1' or '1' = '1 문자열을 입력하면 쿼리는 다음과 같습니다.

/accounts/account[acctID='1' or '1' = '1']/email/text()1' or '1' = '1 조건을 추가하면 where 절이 항상 true로 평가하기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//email/text()

공격자는 이렇게 쿼리를 단순화하여 쿼리가 인증된 사용자가 소유한 항목만 반환해야 한다는 요구 사항을 무시할 수 있습니다. 이제 쿼리는 지정된 소유자와 관계없이 문서에 저장된 모든 전자 메일 주소를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 643
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.1 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XPath Injection (WASC-39)
[57] Standards Mapping - Web Application Security Consortium 24 + 2 XPath Injection
desc.dataflow.php.xpath_injection
Abstract
사용자 입력을 받아 동적으로 XPath 쿼리를 생성하면 공격자가 해당 문의 의미를 수정할 수 있습니다.
Explanation
XPath injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.



2. 데이터를 사용하여 XPath 쿼리를 동적으로 구성합니다.

예제 1: 다음 코드는 주어진 계정 ID의 전자 메일 주소를 검색하는 XPath 쿼리를 동적으로 구성 및 실행합니다. 계정 ID는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


...
tree = etree.parse('articles.xml')
emailAddrs = "/accounts/account[acctID=" + request.GET["test1"] + "]/email/text()"
r = tree.xpath(emailAddrs)
...


계정 번호 1에 속하는 전자 메일 주소를 검색하는 등 일반적인 조건에서는 이 코드가 실행하는 쿼리가 다음과 유사합니다.

/accounts/account[acctID='1']/email/text()

하지만 상수 쿼리 문자열과 사용자 입력 문자열을 연결하여 쿼리를 동적으로 구성하기 때문에, 쿼리는 acctID에 작은따옴표가 들어 있지 않은 경우에만 정확하게 동작합니다. 공격자가 acctID에 1' or '1' = '1 문자열을 입력하면 쿼리는 다음과 같습니다.

/accounts/account[acctID='1' or '1' = '1']/email/text()1' or '1' = '1 조건을 추가하면 where 절이 항상 true로 평가하기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//email/text()

공격자는 이렇게 쿼리를 단순화하여 쿼리가 인증된 사용자가 소유한 항목만 반환해야 한다는 요구 사항을 무시할 수 있습니다. 이제 쿼리는 지정된 소유자와 관계없이 문서에 저장된 모든 전자 메일 주소를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 643
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3
[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2023 Directive 4.14, Rule 1.3
[7] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2008 Rule 0-3-1
[8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C++ Guidelines 2023 Rule 4.1.3
[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.1 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.10 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[13] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[14] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[15] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[16] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2010 A1 Injection
[18] Standards Mapping - OWASP Top 10 2013 A1 Injection
[19] Standards Mapping - OWASP Top 10 2017 A1 Injection
[20] Standards Mapping - OWASP Top 10 2021 A03 Injection
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002550 CAT I, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 XPath Injection (WASC-39)
[57] Standards Mapping - Web Application Security Consortium 24 + 2 XPath Injection
desc.dataflow.python.xpath_injection

XQuery Injection

Abstract
사용자 입력을 받아 동적으로 XQuery 식을 생성하면 공격자가 해당 문의 의미를 수정할 수 있습니다.
Explanation
XQuery injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.



2. 이러한 데이터를 사용하여 XQuery 식을 동적으로 생성합니다.

예제 1: 다음 코드는 지정한 사용자 이름 및 암호 조합과 일치하는 사용자 계정을 검색하기 위한 XQuery 식을 동적으로 생성하고 실행합니다. 사용자 이름과 암호는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


  ...

  String squery = "for \$user in doc(users.xml)//user[username='" + Request["username"] + "'and pass='" + Request["password"] + "'] return \$user";

  Processor processor = new Processor();

  XdmNode indoc = processor.NewDocumentBuilder().Build(new Uri(Server.MapPath("users.xml")));

  StreamReader query = new StreamReader(squery);
  XQueryCompiler compiler = processor.NewXQueryCompiler();
  XQueryExecutable exp = compiler.Compile(query.ReadToEnd());
  XQueryEvaluator eval = exp.Load();
  eval.ContextItem = indoc;

  Serializer qout = new Serializer();
  qout.SetOutputProperty(Serializer.METHOD, "xml");
  qout.SetOutputProperty(Serializer.DOCTYPE_PUBLIC, "-//W3C//DTD XHTML 1.0 Strict//EN");
  qout.SetOutputProperty(Serializer.DOCTYPE_SYSTEM, "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd");
  qout.SetOutputProperty(Serializer.INDENT, "yes");
  qout.SetOutputProperty(Serializer.OMIT_XML_DECLARATION, "no");

  qout.SetOutputWriter(Response.Output);
  eval.Run(qout);

  ...


해당 사용자 이름 및 암호와 일치하는 사용자 계정을 검색하는 등의 일반적인 조건에서 이 코드가 실행하는 식은 다음과 유사합니다.

for \$user in doc(users.xml)//user[username='test_user' and pass='pass123'] return \$user

하지만 상수인 기본 쿼리 문자열과 사용자 입력 문자열을 연결하여 식을 동적으로 생성하기 때문에, 쿼리는 username 또는 password 에 작은따옴표가 들어 있지 않은 경우에만 올바로 작동합니다. 공격자가 username에 admin' or 1=1 or ''=' 문자열을 입력하면 쿼리는 다음과 같습니다.

for \$user in doc(users.xml)//user[username='admin' or 1=1 or ''='' and password='x' or ''=''] return \$useradmin' or 1=1 or ''=' 조건을 추가하면 XQuery 식이 항상 true로 평가되기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//user[username='admin']

이렇게 쿼리를 단순화할 경우 공격자는 쿼리가 암호와 일치해야 한다는 요구 사항을 우회할 수 있습니다. 이제 쿼리는 입력된 암호에 관계없이 문서에 저장된 admin 사용자를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 652
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[7] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[8] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[9] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[10] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[11] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[12] Standards Mapping - OWASP Top 10 2010 A1 Injection
[13] Standards Mapping - OWASP Top 10 2013 A1 Injection
[14] Standards Mapping - OWASP Top 10 2017 A1 Injection
[15] Standards Mapping - OWASP Top 10 2021 A03 Injection
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[28] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[29] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[51] Standards Mapping - Web Application Security Consortium Version 2.00 XQuery Injection (WASC-46)
desc.dataflow.dotnet.xquery_injection
Abstract
사용자 입력을 받아 동적으로 XQuery 식을 생성하면 공격자가 해당 문의 의미를 수정할 수 있습니다.
Explanation
XQuery injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.



2. 이러한 데이터를 사용하여 XQuery 식을 동적으로 생성합니다.

예제 1: 다음 코드는 지정한 사용자 이름 및 암호 조합과 일치하는 사용자 계정을 검색하기 위한 XQuery 식을 동적으로 생성하고 실행합니다. 사용자 이름과 암호는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


  ...
  XQDataSource xqs = new XQDataSource();
  XQConnection conn = xqs.getConnection();
  String query = "for \$user in doc(users.xml)//user[username='" + request.getParameter("username") + "'and pass='" + request.getParameter("password") + "'] return \$user";

  XQPreparedExpression xqpe = conn.prepareExpression(query);

  XQResultSequence rs = xqpe.executeQuery();

  ...


해당 사용자 이름 및 암호와 일치하는 사용자 계정을 검색하는 등의 일반적인 조건에서 이 코드가 실행하는 식은 다음과 유사합니다.

for \$user in doc(users.xml)//user[username='test_user' and pass='pass123'] return \$user

하지만 상수인 기본 쿼리 문자열과 사용자 입력 문자열을 연결하여 식을 동적으로 생성하기 때문에, 쿼리는 username 또는 password 에 작은따옴표가 들어 있지 않은 경우에만 올바로 작동합니다. 공격자가 username에 admin' or 1=1 or ''=' 문자열을 입력하면 쿼리는 다음과 같습니다.

for \$user in doc(users.xml)//user[username='admin' or 1=1 or ''='' and password='x' or ''=''] return \$useradmin' or 1=1 or ''=' 조건을 추가하면 XQuery 식이 항상 true로 평가되기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//user[username='admin']

이렇게 쿼리를 단순화할 경우 공격자는 쿼리가 암호와 일치해야 한다는 요구 사항을 우회할 수 있습니다. 이제 쿼리는 입력된 암호에 관계없이 문서에 저장된 admin 사용자를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 652
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[7] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[8] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[9] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[10] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[11] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[12] Standards Mapping - OWASP Top 10 2010 A1 Injection
[13] Standards Mapping - OWASP Top 10 2013 A1 Injection
[14] Standards Mapping - OWASP Top 10 2017 A1 Injection
[15] Standards Mapping - OWASP Top 10 2021 A03 Injection
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[28] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[29] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[51] Standards Mapping - Web Application Security Consortium Version 2.00 XQuery Injection (WASC-46)
desc.dataflow.java.xquery_injection
Abstract
사용자 입력을 받아 동적으로 XQuery 식을 생성하면 공격자가 해당 문의 의미를 수정할 수 있습니다.
Explanation
XQuery injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.



2. 데이터를 사용하여 XQuery 식을 동적으로 구성합니다.

예제 1: 다음 코드는 지정한 사용자 이름 및 암호 조합과 일치하는 사용자 계정을 검색하기 위한 XQuery 식을 동적으로 생성하고 실행합니다. 사용자 이름과 암호는 HTTP 요청에서 읽어들이므로 신뢰할 수 없습니다.


...

$memstor = InMemoryStore::getInstance();
$z = Zorba::getInstance($memstor);

try {
  // get data manager
  $dataman = $z->getXmlDataManager();

  // load external XML document
  $dataman->loadDocument('users.xml', file_get_contents('users.xml'));

  // create and compile query
  $express =
"for \$user in doc(users.xml)//user[username='" . $_GET["username"] . "'and pass='" . $_GET["password"] . "'] return \$user"

  $query = $zorba->compileQuery($express);

  // execute query
  $result = $query->execute();



?>
...


해당 사용자 이름 및 암호와 일치하는 사용자 계정을 검색하는 등의 일반적인 조건에서 이 코드가 실행하는 식은 다음과 유사합니다.

for \$user in doc(users.xml)//user[username='test_user' and pass='pass123'] return \$user

하지만 상수 쿼리 문자열과 사용자 입력 문자열을 연결하여 식을 동적으로 생성하기 때문에, 쿼리는 username 또는 password에 작은따옴표가 들어 있지 않은 경우에만 올바로 작동합니다. 공격자가 username에 admin' or 1=1 or ''=' 문자열을 입력하면 쿼리는 다음과 같습니다.

for \$user in doc(users.xml)//user[username='admin' or 1=1 or ''='' and password='x' or ''=''] return \$useradmin' or 1=1 or ''=' 조건을 추가하면 XQuery 식이 항상 true로 평가되기 때문에 쿼리는 훨씬 간단한 다음 쿼리와 논리적으로 동일하게 됩니다.

//user[username='admin']

이렇게 쿼리를 단순화할 경우 공격자는 쿼리가 암호와 일치해야 한다는 요구 사항을 우회할 수 있습니다. 이제 쿼리는 입력된 암호에 관계없이 문서에 저장된 admin 사용자를 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 652
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[7] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[8] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[9] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[10] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[11] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[12] Standards Mapping - OWASP Top 10 2010 A1 Injection
[13] Standards Mapping - OWASP Top 10 2013 A1 Injection
[14] Standards Mapping - OWASP Top 10 2017 A1 Injection
[15] Standards Mapping - OWASP Top 10 2021 A03 Injection
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[28] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[29] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[51] Standards Mapping - Web Application Security Consortium Version 2.00 XQuery Injection (WASC-46)
desc.dataflow.php.xquery_injection

XSLT Injection

Abstract
확인되지 않은 XSL 스타일시트를 처리하면 공격자가 그 결과로 생긴 XML의 구조와 내용을 변경하거나, 파일 시스템에서 임의의 파일을 포함하거나, 임의의 코드를 실행할 수 있습니다.
Explanation
XSLT injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XSL 스타일시트에 데이터가 작성됩니다.


일반적으로 응용 프로그램은 XSL 스타일시트를 사용하여 XML 문서의 형식을 다른 형식으로 변환합니다. XSL 스타일시트에는 변환 프로세스를 향상시키지만 잘못 사용할 경우 다른 취약점을 발생시키는 특수 함수가 있습니다.

공격자가 스타일시트에 XSL 요소를 쓸 수 있는 경우 XSL 스타일시트의 의미와 처리가 변경될 수 있습니다. 공격자는 Cross-Site Scripting 공격이 가능하도록 스타일시트의 출력을 변경하거나, 로컬 파일 시스템 리소스의 콘텐트를 노출하거나, 임의의 코드를 실행할 수 있습니다.

예제 1: 다음은 XSLT Injection에 취약한 일부 코드입니다.


  ...
  String xmlUrl = Request["xmlurl"];
  String xslUrl = Request["xslurl"];

  XslCompiledTransform xslt = new XslCompiledTransform();
  xslt.Load(xslUrl);

  xslt.Transform(xmlUrl, "books.html");
  ...
Example 1은 공격자가 식별된 XSL을 XSTL 프로세서로 전달하는 경우 세 가지 다른 익스플로이트를 초래합니다.

1. XSS:



  <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="/">
      <script>alert(123)</script>
    </xsl:template>
  </xsl:stylesheet>


XSL 스타일시트가 처리될 때 <script> 태그가 피해자의 브라우저에 렌더링되어 cross-site scripting 공격이 수행될 수 있습니다.

2. 서버의 파일 시스템에 있는 임의의 파일을 읽습니다.



  <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="/">
      <xsl:copy-of select="document('file:///c:/winnt/win.ini')"/>
    </xsl:template>
  </xsl:stylesheet>


앞선 XSL 스타일시트는 /etc/passwd 파일의 내용을 반환합니다.

3. 임의의 코드를 실행합니다.

XSLT 프로세서는 네이티브 언어 메서드가 비활성화되지 않은 경우 XSLT 함수로 노출할 수 있습니다.



  <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:App="http://www.tempuri.org/App">
    <msxsl:script implements-prefix="App" language="C#">
      <![CDATA[
        public string ToShortDateString(string date)
          {
              System.Diagnostics.Process.Start("cmd.exe");
              return "01/01/2001";
          }
      ]]>
    </msxsl:script>
    <xsl:template match="ArrayOfTest">
      <TABLE>
        <xsl:for-each select="Test">
          <TR>
          <TD>
            <xsl:value-of select="App:ToShortDateString(TestDate)" />
          </TD>
          </TR>
        </xsl:for-each>
      </TABLE>
    </xsl:template>
  </xsl:stylesheet>


앞선 스타일시트는 서버에서 “cmd.exe” 명령을 실행합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 494
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 1.14.2 Configuration Architectural Requirements (L2 L3), 10.3.2 Deployed Application Integrity Controls (L1 L2 L3), 12.3.3 File Execution Requirements (L1 L2 L3), 14.2.3 Dependency (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[9] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[11] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[12] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[13] Standards Mapping - OWASP Top 10 2010 A1 Injection
[14] Standards Mapping - OWASP Top 10 2013 A1 Injection
[15] Standards Mapping - OWASP Top 10 2017 A1 Injection
[16] Standards Mapping - OWASP Top 10 2021 A03 Injection
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[52] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.dotnet.xslt_injection
Abstract
확인되지 않은 XSL 스타일시트를 처리하면 공격자가 그 결과로 생긴 XML의 구조와 내용을 변경하거나, 파일 시스템에서 임의의 파일을 포함하거나, 임의의 코드를 실행할 수 있습니다.
Explanation
XSLT injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XSL 스타일시트에 데이터가 작성됩니다.


일반적으로 응용 프로그램은 XSL 스타일시트를 사용하여 XML 문서의 형식을 다른 형식으로 변환합니다. XSL 스타일시트에는 변환 프로세스를 향상시키지만 잘못 사용할 경우 다른 취약점을 발생시키는 특수 함수가 있습니다.

공격자가 스타일시트에 XSL 요소를 쓸 수 있는 경우 XSL 스타일시트의 의미와 처리가 변경될 수 있습니다. 공격자는 Cross-Site Scripting 공격이 가능하도록 스타일시트의 출력을 변경하거나, 로컬 파일 시스템 리소스의 콘텐트를 노출하거나, 임의의 코드를 실행할 수 있습니다.

예제 1: 다음은 XSLT Injection에 취약한 일부 코드입니다.


  ...
  InputStream xmlUrl = Utils.getFromURL(request.getParameter("xmlurl"));
  InputStream xsltUrl = Utils.getFromURL(request.getParameter("xslurl"));

  Source xmlSource = new StreamSource(xmlUrl);
  Source xsltSource = new StreamSource(xsltUrl);
  Result result = new StreamResult(System.out);

  TransformerFactory transFact = TransformerFactory.newInstance();
  Transformer trans = transFact.newTransformer(xsltSource);
  trans.transform(xmlSource, result);
  ...
Example 1의 코드는 공격자가 식별된 XSL을 XSTL 프로세서로 전달하는 경우 세 가지 다른 익스플로이트를 초래합니다.

1. XSS:



  <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="/">
      <script>alert(123)</script>
    </xsl:template>
  </xsl:stylesheet>


XSL 스타일시트가 처리될 때 <script> 태그가 피해자의 브라우저에 렌더링되어 cross-site scripting 공격이 수행될 수 있습니다.

2. 서버의 파일 시스템에 있는 임의의 파일을 읽습니다.



  <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="/">
      <xsl:copy-of select="document('/etc/passwd')"/>
    </xsl:template>
  </xsl:stylesheet>


앞선 XSL 스타일시트는 /etc/passwd 파일의 내용을 반환합니다.

3. 임의의 Java 코드를 실행합니다.

XSLT 프로세서는 네이티브 Java 언어 메서드가 비활성화되지 않은 경우 XSLT 함수로 노출할 수 있습니다.



  <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:rt="http://xml.apache.org/xalan/java/java.lang.Runtime" xmlns:ob="http://xml.apache.org/xalan/java/java.lang.Object">
    <xsl:template match="/">
      <xsl:variable name="rtobject" select="rt:getRuntime()"/>
      <xsl:variable name="process" select="rt:exec($rtobject,'ls')"/>
      <xsl:variable name="processString" select="ob:toString($process)"/>
      <xsl:value-of select="$processString"/>
    </xsl:template>
  </xsl:stylesheet>


위의 스타일시트는 서버에서 “ls” 명령을 실행합니다.
References
[1] INJECT-8: Take care interpreting untrusted code Oracle
[2] Standards Mapping - Common Weakness Enumeration CWE ID 494
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[4] Standards Mapping - FIPS200 SI
[5] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[8] Standards Mapping - OWASP Application Security Verification Standard 4.0 1.14.2 Configuration Architectural Requirements (L2 L3), 10.3.2 Deployed Application Integrity Controls (L1 L2 L3), 12.3.3 File Execution Requirements (L1 L2 L3), 14.2.3 Dependency (L1 L2 L3)
[9] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[10] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[11] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[12] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[13] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[14] Standards Mapping - OWASP Top 10 2010 A1 Injection
[15] Standards Mapping - OWASP Top 10 2013 A1 Injection
[16] Standards Mapping - OWASP Top 10 2017 A1 Injection
[17] Standards Mapping - OWASP Top 10 2021 A03 Injection
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[30] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[53] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.java.xslt_injection
Abstract
확인되지 않은 XSL 스타일시트를 처리하면 공격자가 그 결과로 생긴 XML의 구조와 내용을 변경하거나, 파일 시스템에서 임의의 파일을 포함하거나, 임의의 코드를 실행할 수 있습니다.
Explanation
XSLT injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XSL 스타일시트에 데이터가 작성됩니다.


일반적으로 응용 프로그램은 XSL 스타일시트를 사용하여 XML 문서의 형식을 다른 형식으로 변환합니다. XSL 스타일시트에는 변환 프로세스를 향상시키지만 잘못 사용할 경우 다른 취약점을 발생시키는 특수 함수가 있습니다.

공격자가 스타일시트에 XSL 요소를 쓸 수 있는 경우 XSL 스타일시트의 의미와 처리가 변경될 수 있습니다. 공격자는 Cross-Site Scripting 공격이 가능하도록 스타일시트의 출력을 변경하거나, 로컬 파일 시스템 리소스의 콘텐트를 노출하거나, 임의의 코드를 실행할 수 있습니다. 공격자가 응용 프로그램에 전송되는 스타일시트를 완전히 제어할 수 있는 경우에는 XXE(XML 외부 엔터티) injection 공격도 실행할 수 있습니다.

예제 1: 다음은 XSLT Injection에 취약한 일부 코드입니다.


...
<?php

$xml = new DOMDocument;
$xml->load('local.xml');

$xsl = new DOMDocument;
$xsl->load($_GET['key']);

$processor = new XSLTProcessor;
$processor->registerPHPFunctions();
$processor->importStyleSheet($xsl);

echo $processor->transformToXML($xml);

?>
...
Example 1의 코드는 공격자가 식별된 XSL을 XSTL 프로세서로 전달하는 경우 세 가지 다른 익스플로이트를 초래합니다.

1. XSS:



<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl">
<xsl:template match="/">
<script>alert(123)</script>
</xsl:template>
</xsl:stylesheet>



XSL 스타일시트가 처리될 때 <script> 태그가 피해자의 브라우저에 렌더링되어 cross-site scripting 공격이 수행될 수 있습니다.

2. 서버의 파일 시스템에 있는 임의의 파일을 읽습니다.



<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl">
<xsl:template match="/">
<xsl:copy-of select="document('/etc/passwd')"/>
</xsl:template>
</xsl:stylesheet>



앞선 XSL 스타일시트는 /etc/passwd 파일의 내용을 반환합니다.

3. 임의의 PHP 코드를 실행합니다.

XSLT 프로세서는 "registerPHPFunctions"를 활성화하여 네이티브 PHP 언어 메서드를 XSLT 함수로 노출할 수 있습니다.



<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl">
<xsl:template match="/">
<xsl:value-of select="php:function('passthru','ls -la')"/>
</xsl:template>
</xsl:stylesheet>



앞선 스타일시트는 서버에서 실행된 “ls” 명령의 결과를 출력합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 494
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 1.14.2 Configuration Architectural Requirements (L2 L3), 10.3.2 Deployed Application Integrity Controls (L1 L2 L3), 12.3.3 File Execution Requirements (L1 L2 L3), 14.2.3 Dependency (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[9] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[11] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[12] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[13] Standards Mapping - OWASP Top 10 2010 A1 Injection
[14] Standards Mapping - OWASP Top 10 2013 A1 Injection
[15] Standards Mapping - OWASP Top 10 2017 A1 Injection
[16] Standards Mapping - OWASP Top 10 2021 A03 Injection
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[52] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.php.xslt_injection
Abstract
확인되지 않은 XSL 스타일시트를 처리하면 공격자가 그 결과로 생긴 XML의 구조와 내용을 변경하거나, 파일 시스템에서 임의의 파일을 포함하거나, 임의의 코드를 실행할 수 있습니다.
Explanation
XSLT injection은 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. XSL 스타일시트에 데이터가 작성됩니다.


일반적으로 응용 프로그램은 XSL 스타일시트를 사용하여 XML 문서의 형식을 다른 형식으로 변환합니다. XSL 스타일시트에는 변환 프로세스를 향상시키지만 잘못 사용할 경우 다른 취약점을 발생시키는 특수 함수가 있습니다.

공격자가 스타일시트에 XSL 요소를 쓸 수 있는 경우 XSL 스타일시트의 의미와 처리가 변경될 수 있습니다. 공격자는 Cross-Site Scripting 공격이 가능하도록 스타일시트의 출력을 변경하거나, 로컬 파일 시스템 리소스의 콘텐트를 노출하거나, 임의의 코드를 실행할 수 있습니다.

예제 1: 다음은 XSLT Injection에 취약한 일부 코드입니다.


...
xml = StringIO.StringIO(request.POST['xml'])
xslt = StringIO.StringIO(request.POST['xslt'])

xslt_root = etree.XML(xslt)
transform = etree.XSLT(xslt_root)
result_tree = transform(xml)
return render_to_response(template_name, {'result': etree.tostring(result_tree)})
...
Example 1의 코드는 공격자가 식별된 XSL을 XSTL 프로세서로 전달하는 경우 세 가지 다른 익스플로이트를 초래합니다.

1. XSS:



<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:template match="/">
    <script>alert(123)</script>
  </xsl:template>
</xsl:stylesheet>



XSL 스타일시트가 처리될 때 <script> 태그가 피해자의 브라우저에 렌더링되어 cross-site scripting 공격이 수행될 수 있습니다.

2. 서버의 파일 시스템에 있는 임의의 파일을 읽습니다.



<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:template match="/">
    <xsl:copy-of select="document('/etc/passwd')"/>
  </xsl:template>
</xsl:stylesheet>



앞선 XSL 스타일시트는 /etc/passwd 파일의 내용을 반환합니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 494
[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[3] Standards Mapping - FIPS200 SI
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 1.14.2 Configuration Architectural Requirements (L2 L3), 10.3.2 Deployed Application Integrity Controls (L1 L2 L3), 12.3.3 File Execution Requirements (L1 L2 L3), 14.2.3 Dependency (L1 L2 L3)
[8] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[9] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[11] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[12] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[13] Standards Mapping - OWASP Top 10 2010 A1 Injection
[14] Standards Mapping - OWASP Top 10 2013 A1 Injection
[15] Standards Mapping - OWASP Top 10 2017 A1 Injection
[16] Standards Mapping - OWASP Top 10 2021 A03 Injection
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[52] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.python.xslt_injection