계: Input Validation and Representation

입력 검증 및 표현 문제는 메타 문자, 대체 인코딩 및 숫자 표현 때문에 발생합니다. 보안 문제는 입력을 신뢰하기 때문에 발생합니다. 문제로는 "Buffer Overflows", "Cross-Site Scripting" 공격, "SQL Injection", 그 외 여러 가지가 있습니다.

OGNL Expression Injection: Double Evaluation

Java/JSP

Abstract

이중 OGNL 평가를 통해 공격자는 첫 번째 평가의 출력을 제어할 때 임의의 OGNL 식을 평가할 수 있습니다.

Explanation

응용 프로그램은 OGNL 식을 두 번 평가하는 Struts 태그에서 강제 OGNL 식(%{expr})을 사용합니다. 첫 번째 평가의 결과를 제어하는 공격자는 두 번째 OGNL 평가에서 평가될 식을 제어하고 임의의 OGNL 식을 삽입할 수 있습니다.

예제 1:redirectAction 결과는 매개 변수를 두 번 평가하는 것으로 알려져 있습니다. 이 경우 actionName 매개 변수의 강제 OGNL 식의 결과가 redirect 요청 매개 변수를 제공하여 공격자에 의해 제어될 수 있습니다.


    ...
    <action name="index" class="com.acme.MyAction">
        <result type="redirectAction">
            <param name="actionName">${#parameters['redirect']}</param>
            <param name="namespace">/foo</param>
        </result>
    </action>
    ...

Struts 2 코드는 내부적으로 %{#parameters['redirect']} 식을 평가하여 OGNL 식으로 평가될 사용자 제어 문자열을 반환하여 공격자가 임의의 OGNL 식을 평가할 수 있도록 합니다.

References

[1] Struts 2 - Security Bulletin S2-029 Apache Struts

[2] Struts 2 - Security Bulletin S2-036 Apache Struts

[3] Standards Mapping - Common Weakness Enumeration CWE ID 94, CWE ID 95

[4] Standards Mapping - Common Weakness Enumeration Top 25 2019 [18] CWE ID 094

[5] Standards Mapping - Common Weakness Enumeration Top 25 2020 [17] CWE ID 094

[6] Standards Mapping - Common Weakness Enumeration Top 25 2022 [25] CWE ID 094

[7] Standards Mapping - Common Weakness Enumeration Top 25 2023 [23] CWE ID 094

[8] Standards Mapping - Common Weakness Enumeration Top 25 2024 [11] CWE ID 094

[9] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754

[10] Standards Mapping - FIPS200 SI

[11] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data

[12] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)

[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation

[14] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.2.4 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.2.5 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.2.8 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.3.6 Output Encoding and Injection Prevention Requirements (L1 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 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 - SANS Top 25 2009 Risky Resource Management - CWE ID 094

[36] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I, APP3570 CAT I

[37] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3570 CAT I

[38] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3570 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3570 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3570 CAT I

[41] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3570 CAT I

[42] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3570 CAT I

[43] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I

[45] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I

[46] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I

[47] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I

[48] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I

[49] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I

[50] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I

[51] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I

[52] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I

[53] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I

[54] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I

[55] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I

[56] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I

[57] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I

[58] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)

desc.configuration.java.ognl_expression_injection_double_evaluation