PHP Misconfiguration: Missing safe_mode_exec_dir Entry

Abstract

如果将 PHP 配置为调用任意程序，会导致攻击者能执行恶意命令。

Explanation

如果启用 safe_mode，safe_mode_exec_dir 选项会限制 PHP 仅从指定的目录执行命令。尽管禁用 safe_mode_exec_dir 条目这一做法本身并不是一种安全漏洞，但这一画蛇添足的行为可能会被攻击者利用，并结合其他漏洞制造更大的危机。

References

[1] M. Achour et al. PHP Manual

[2] Artur Maj Securing PHP

[3] Standards Mapping - Common Weakness Enumeration CWE ID 553

[4] Standards Mapping - FIPS200 CM

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

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

[7] Standards Mapping - OWASP Application Security Verification Standard 4.0 12.5.1 File Download Requirements (L1 L2 L3)

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

[9] Standards Mapping - OWASP Top 10 2004 A10 Insecure Configuration Management

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

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

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

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

[14] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10

[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.6

[16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.6

[17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.6

[18] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.6

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

[20] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4

[21] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection

[22] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection

[23] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection

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

desc.structural.php.php_misconfiguration_safe_mode_exec_dir