계: Environment

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PHP Misconfiguration: cgi.force_redirect Disabled

Abstract

웹에서 사용자가 직접 PHP 인터프리터를 호출할 수 있도록 허용하면 공격자는 권한 검사를 무시하고 서버에서 보호된 파일에 접근할 수 있습니다.

Explanation

PHP 인터프리터가 CGI 바이너리로 설치되면 일반적으로 PHP 리소스에 대한 요청은 인터프리터에 대한 웹 서버에서 리디렉션됩니다. 이 경우, 사용자가 http://www.example.com/content/page.php를 요청하면 먼저 서버는 디렉터리/콘텐트에 대한 필수 access control 검사를 허용한 후 http://www.example.com/cgi-bin/php/content/page.php에 대한 요청을 사용하여 PHP 인터프리터에 대한 제어를 리디렉션합니다.

기본적으로 활성화되어 있는 cgi.force_redirect를 비활성화할 경우, /cgi-bin/php에 대한 접근 권한이 있는 공격자는 PHP 인터프리터에 대한 권한을 사용하여 임의의 웹 문서에 접근하고 서버에서 수행한 access control 검사를 무시하게 됩니다.

References

[1] M. Achour et al. PHP Manual

[2] Standards Mapping - Common Weakness Enumeration CWE ID 305

[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [13] CWE ID 287

[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [14] CWE ID 287

[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [14] CWE ID 287

[6] Standards Mapping - Common Weakness Enumeration Top 25 2022 [14] CWE ID 287

[7] Standards Mapping - Common Weakness Enumeration Top 25 2023 [13] CWE ID 287

[8] Standards Mapping - Common Weakness Enumeration Top 25 2024 [14] CWE ID 287

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

[10] Standards Mapping - FIPS200 AC

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

[12] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1)

[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement

[14] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration

[15] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.7.1 Out of Band Verifier Requirements (L1 L2 L3), 2.7.2 Out of Band Verifier Requirements (L1 L2 L3), 2.7.3 Out of Band Verifier Requirements (L1 L2 L3), 2.8.4 Single or Multi Factor One Time Verifier Requirements (L2 L3), 2.8.5 Single or Multi Factor One Time Verifier Requirements (L2 L3), 3.7.1 Defenses Against Session Management Exploits (L1 L2 L3), 9.2.3 Server Communications Security Requirements (L2 L3)

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

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

[18] Standards Mapping - OWASP Top 10 2007 A10 Failure to Restrict URL Access

[19] Standards Mapping - OWASP Top 10 2010 A8 Failure to Restrict URL Access

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

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

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

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2, Requirement 7.2

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.10, Requirement 7.2

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8, Requirement 7.2

[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8, Requirement 7.2

[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8, Requirement 7.2

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8, Requirement 7.2

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8, Requirement 7.2

[30] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4, Requirement 7.3.1

[31] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4, Requirement 7.3.1

[32] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control

[33] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control

[34] 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

[35] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3480.1 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3480.1 CAT I

[37] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3480.1 CAT I

[38] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3480.1 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3480.1 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3480.1 CAT I

[41] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3480.1 CAT I

[42] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

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

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

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

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

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

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

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

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

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

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

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

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

[55] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

[56] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

[57] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

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

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