界: Input Validation and Representation

输入验证与表示问题是由元字符、交替编码和数字表示引起的。安全问题源于信任输入。这些问题包括：“Buffer Overflows”、“Cross-Site Scripting”攻击、“SQL Injection”等其他问题。

Illegal Pointer Value

C/C++

Abstract

某些函数可以返回指向要搜索的缓冲区边界之外的内存的指针。对指针的后续操作可能会产生意想不到的后果。

Explanation

在以下任一情况下，用于搜索缓冲区内字符的函数可以返回指向缓冲区边界之外的指针：

- 用户控制要搜索的缓冲区的内容。

- 用户控制要搜索的值。

示例 1：以下短程序在调用 rawmemchr() 时使用不受信任的命令行参数作为搜索缓冲区。


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

该程序本来是要输出 argv[0] 的一个子字符串，但是程序最终可能会输出位于 argv[0] 之前的部分内存。

该问题类似于字符串终止错误，即程序员利用字符数组来包含 null 终止符。

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