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.

Illegal Pointer Value

Abstract
일부 함수는 검색할 버퍼 범위 외부의 메모리를 가리키는 포인터를 반환할 수도 있습니다. 이 경우 해당 포인터에서 후속 작업을 수행하면 의도하지 않은 결과가 발생할 수 있습니다.
Explanation
버퍼 내에서 문자를 검색하는 함수는 다음 상황 중 하나에서 제공되는 버퍼 범위 외부의 포인터를 반환할 수 있습니다.

- 사용자가 검색할 버퍼의 콘텐트를 제어하는 경우

- 사용자가 검색할 값을 제어하는 경우

예제 1: 아래의 간단한 프로그램은 rawmemchr() 호출에서 신뢰할 수 없는 명령줄 인수를 검색 버퍼로 사용합니다.


int main(int argc, char** argv) {
  char* ret = rawmemchr(argv[0], 'x');
  printf("%s\n", ret);
}


프로그램은 argv[0]의 부분 문자열을 인쇄하기 위한 것이지만 argv[0] 위에 있는 메모리 부분을 인쇄하게 됩니다.

이 문제는 프로그래머가 null 종결자를 포함하기 위해 문자 배열에 의존하는 string termination error와 비슷합니다.
References
[1] M. Howard, D. LeBlanc Writing Secure Code, Second Edition Microsoft Press
[2] Standards Mapping - Common Weakness Enumeration CWE ID 466
[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [1] CWE ID 119
[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [5] CWE ID 119
[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [17] CWE ID 119
[6] Standards Mapping - Common Weakness Enumeration Top 25 2022 [19] CWE ID 119
[7] Standards Mapping - Common Weakness Enumeration Top 25 2023 [17] CWE ID 119
[8] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754, CCI-002824
[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 - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1), SI-16 Memory Protection (P1)
[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation, SI-16 Memory Protection
[14] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[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 A5 Buffer Overflow
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.5
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.2
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.2
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.2
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.2
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.2
[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 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 - SANS Top 25 2009 Risky Resource Management - CWE ID 119
[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, APSC-DV-002590 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I, APSC-DV-002590 CAT I
desc.semantic.cpp.illegal_pointer_value.master