界: Environment

このセクションには、ソースコード以外のものでも、作成中の製品のセキュリティにとって重要なものがすべて含まれています。この分野が対象とする問題は、ソースコードに直接関係しないため、この分野の他の部分と分けました。

PHP Misconfiguration: Missing safe_mode_exec_dir Entry

Abstract

任意のプログラムを呼び出すように PHP を設定すると、攻撃者が悪意あるコマンドを実行できる可能性があります。

Explanation

safe_mode が有効に設定されていると、PHP safe_mode_exec_dir オプションによって PHP は指定されているディレクトリからのみコマンドを実行できるように制限されます。safe_mode_exec_dir エントリが欠如していてもセキュリティ上の脆弱性が発生する訳ではありませんが、制限が緩くなるため、攻撃者がほかの脆弱性と組み合わせてより危険な悪用方法を生み出す可能性があります。

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