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.

Access Specifier Manipulation

Java/JSP
Ruby

Abstract

메서드 호출에서 접근 지정자가 변경됩니다.

Explanation

프로그래머는 AccessibleObject API를 사용하여 Java 액세스 지정자가 제공하는 access control 검사를 회피할 수 있습니다. 특히 프로그래머는 reflected 개체가 Java 액세스 제어를 무시하도록 허용하고 개인 필드의 값을 변경하거나 private 메서드를 호출할 수 있지만, 이러한 동작은 일반적으로 허용되지 않습니다.

References

[1] Standards Mapping - Common Weakness Enumeration CWE ID 284

[2] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001084, CCI-001310, CCI-002165

[3] Standards Mapping - FIPS200 AC

[4] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation

[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), CM-5 Access Restrictions for Change (P1), SC-3 Security Function Isolation (P1), SI-10 Information Input Validation (P1)

[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, CM-5 Access Restrictions for Change, SC-3 Security Function Isolation, SI-10 Information Input Validation

[7] Standards Mapping - OWASP API 2023 API1 Broken Object Level Authorization

[8] Standards Mapping - OWASP Application Security Verification Standard 4.0 1.4.2 Access Control Architectural Requirements (L2 L3), 1.4.4 Access Control Architectural Requirements (L2 L3)

[9] Standards Mapping - OWASP Mobile 2014 M5 Poor Authorization and Authentication

[10] Standards Mapping - OWASP Mobile 2024 M3 Insecure Authentication/Authorization

[11] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-AUTH-1, MASVS-CODE-4

[12] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control

[13] Standards Mapping - OWASP Top 10 2007 A4 Insecure Direct Object Reference

[14] Standards Mapping - OWASP Top 10 2010 A4 Insecure Direct Object References

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

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

[17] Standards Mapping - OWASP Top 10 2021 A01 Broken Access Control

[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2

[19] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.4

[20] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4

[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, Control Objective C.3.2 - Web Software Attack Mitigation

[29] Standards Mapping - SANS Top 25 2011 Risky Resource Management - CWE ID 676

[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-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001410 CAT II, APSC-DV-002360 CAT II, APSC-DV-002530 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001410 CAT II, APSC-DV-002360 CAT II, APSC-DV-002530 CAT II

[52] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Authorization (WASC-02)

[53] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Authorization

desc.dataflow.java.access_specifier_manipulation

Abstract

메서드 호출에서 접근 지정자가 변경하거나 우회됩니다.

Explanation

send 함수 및 해당 변형을 사용하면 프로그래머는 함수에 대한 Ruby 접근 지정자를 우회할 수 있습니다. 특히 프로그래머는 일반적으로는 허용되지 않는 개인(private) 및 보호(protected) 필드에의 접근이 가능합니다.