界: Input Validation and Representation

入力の検証や表現の問題は、メタキャラクター、代替エンコーディング、数値表現などによって引き起こされます。セキュリティの問題は、入力を信頼することに起因します。この問題に含まれるのは、「Buffer Overflow」、「Cross-Site Scripting」攻撃、「SQL Injection」などです。

Command Injection: GitHub Actions

YAML

Abstract

GitHub Action 実行スクリプトで特定の GitHub Action 式を直接参照すると、システムがコマンドインジェクションに対して脆弱なままになります。

Explanation

実行スクリプト内の GitHub Action 式への直接参照は、動的に生成されます。これにより、入力を制御できる人は誰でも、コマンドインジェクションを使用してシステムを危険にさらすことが可能になります。

例 1: GitHub Action からの次のコードは、実行スクリプト内の式を直接参照しており、システムがコマンドインジェクションを受けやすいままになります。


    ...
    steps:
      - run: echo "${{  github.event.pull_request.title  }}"
    ...

アクションが実行されると、github.event.pull_request.title 値が表す任意のコードを含めて、シェルスクリプトが動的に実行されます。github.event.pull_request.title に悪意のある実行可能コードが含まれている場合、アクションによって悪意のあるコードが実行され、コマンドインジェクションが発生します。

References

[1] Security Hardening for GitHub Actions - Good Practices for Mitigating Script Injection Attacks

[2] Standards Mapping - Common Weakness Enumeration CWE ID 77, CWE ID 78

[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [11] CWE ID 078

[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [10] CWE ID 078

[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [5] CWE ID 078, [25] CWE ID 077

[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754

[7] Standards Mapping - FIPS200 SI

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

[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)

[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation

[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.2.2 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.2.3 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.2.5 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.2.8 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.3.6 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.8 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 10.3.2 Deployed Application Integrity Controls (L1 L2 L3), 12.3.2 File Execution Requirements (L1 L2 L3), 12.3.5 File Execution Requirements (L1 L2 L3)

[12] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection

[13] Standards Mapping - OWASP Mobile 2024 M2 Inadequate Supply Chain Security

[14] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws

[15] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws

[16] Standards Mapping - OWASP Top 10 2010 A1 Injection

[17] Standards Mapping - OWASP Top 10 2013 A1 Injection

[18] Standards Mapping - OWASP Top 10 2017 A1 Injection

[19] Standards Mapping - OWASP Top 10 2021 A03 Injection

[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1

[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1

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

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

[29] 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

[30] 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

[31] Standards Mapping - SANS Top 25 2009 Insecure Interaction - CWE ID 078

[32] Standards Mapping - SANS Top 25 2010 Insecure Interaction - CWE ID 078

[33] Standards Mapping - SANS Top 25 2011 Insecure Interaction - CWE ID 078

[34] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I, APP3570 CAT I

[35] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3570 CAT I

[36] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3570 CAT I

[37] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3570 CAT I

[38] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3570 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3570 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3570 CAT I

[41] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[42] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[43] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[45] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[46] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[47] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[48] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[49] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[50] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[51] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[52] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[53] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I

[54] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002510 CAT I, APSC-DV-002530 CAT II, APSC-DV-002560 CAT I

[55] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002510 CAT I, APSC-DV-002530 CAT II, APSC-DV-002560 CAT I

[56] Standards Mapping - Web Application Security Consortium Version 2.00 OS Commanding (WASC-31)

[57] Standards Mapping - Web Application Security Consortium 24 + 2 OS Commanding

desc.structural.yaml.command_injection_github_actions