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.

Struts: Form Field Without Validator

Java/JSP

Abstract

폼의 모든 필드는 상응하는 Validation Form(검증 폼)으로 확인해야 합니다.

Explanation

입력 필드를 하나만 검증하지 않아도 공격자에게 공격의 여지를 제공할 수 있습니다.

검증되지 않은 입력은 오늘날 가장 빈번하게 발생하고 가장 심각한 소프트웨어 보안 문제의 원인입니다. Cross-Site Scripting, SQL Injection 및 Process Control 취약점은 모두 입력값 검증이 불완전하거나 없는 것에서 비롯됩니다. J2EE 응용 프로그램은 보통 메모리 손상 공격에는 취약하지 않지만 J2EE 응용 프로그램이 배열 범위 검사를 수행하지 않는 네이티브 코드와 상호 작용하는 경우, 공격자가 J2EE 응용 프로그램의 입력값 검증 실수를 이용하여 버퍼 오버플로 공격을 시작할 수 있습니다.

일부 응용 프로그램은 둘 이상의 목적에 하나의 ActionForm을 사용합니다. 이런 경우 일부 필드는 작업 매핑(Action mapping)에서 사용되지 않을 수도 있습니다. 사용하지 않는 필드도 반드시 확인해야 합니다. 가급적이면 사용하지 않는 필드를 제한하여 비워두거나 정의하지 않도록 해야 합니다. 사용하지 않는 필드를 확인하지 않으면 action의 공유 비즈니스 로직으로 인해 공격자가 해당 폼을 다른 용도로 사용하기 위해 수행하는 검증 검사를 무시할 수 있습니다.

References

[1] T. Husted et al. Struts in Action: Building Web Applications with the Leading Java Framework Manning Publications

[2] The Struts project The Apache Foundation

[3] Standards Mapping - Common Weakness Enumeration CWE ID 105

[4] Standards Mapping - Common Weakness Enumeration Top 25 2019 [3] CWE ID 020

[5] Standards Mapping - Common Weakness Enumeration Top 25 2020 [3] CWE ID 020

[6] Standards Mapping - Common Weakness Enumeration Top 25 2021 [4] CWE ID 020

[7] Standards Mapping - Common Weakness Enumeration Top 25 2022 [4] CWE ID 020

[8] Standards Mapping - Common Weakness Enumeration Top 25 2023 [6] CWE ID 020

[9] Standards Mapping - Common Weakness Enumeration Top 25 2024 [12] CWE ID 020

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

[11] Standards Mapping - FIPS200 SI

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

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

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

[15] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.1.3 Input Validation Requirements (L1 L2 L3), 5.1.4 Input Validation Requirements (L1 L2 L3)

[16] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls

[17] Standards Mapping - OWASP Top 10 2004 A1 Unvalidated Input

[18] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration

[19] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration

[20] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration

[21] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1

[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-002560 CAT I

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[55] Standards Mapping - Web Application Security Consortium Version 2.00 Application Misconfiguration (WASC-15)

desc.config.java.struts_form_field_without_validator