rules:
  - id: third-party-action-not-pinned-to-commit-sha
    patterns:
      - pattern-inside: "{steps: ...}"
      - pattern: |
          uses: "$USES"
      - metavariable-pattern:
          metavariable: $USES
          language: generic
          patterns:
            - pattern-not-regex: ^[.]/
            - pattern-not-regex: ^actions/
            - pattern-not-regex: ^github/
            - pattern-not-regex: ^gradio-app/gradio
            - pattern-not-regex: ^gradio-app/github
            - pattern-not-regex: "@[0-9a-f]{40}$"
            - pattern-not-regex: ^docker://.*@sha256:[0-9a-f]{64}$
            - pattern-not-regex: ^docker://docker$
    message:
      An action sourced from a third-party repository on GitHub is not pinned
      to a full length commit SHA. Pinning an action to a full length commit SHA
      is currently the only way to use an action as an immutable release.
      Pinning to a particular SHA helps mitigate the risk of a bad actor adding
      a backdoor to the action's repository, as they would need to generate a
      SHA-1 collision for a valid Git object payload.
    languages:
      - yaml
    severity: WARNING
    metadata:
      cwe:
        - "CWE-1357: Reliance on Insufficiently Trustworthy Component"
        - "CWE-353: Missing Support for Integrity Check"
      owasp: A06:2021 - Vulnerable and Outdated Components
      references:
        - https://owasp.org/Top10/A06_2021-Vulnerable_and_Outdated_Components
        - https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-third-party-actions
      category: security
      technology:
        - github-actions
      subcategory:
        - vuln
      likelihood: LOW
      impact: LOW
      confidence: HIGH
      license: Commons Clause License Condition v1.0[LGPL-2.1-only]
      vulnerability_class:
        - Cryptographic Issues
        - Other

  - id: insecure-file-permissions
    languages:
      - python
    severity: ERROR
    message: These permissions `$BITS` are widely permissive and grant access to
      more people than may be necessary. A good default is `0o644` which gives
      read and write access to yourself and read access to everyone else.
    patterns:
      - pattern-inside: os.$METHOD(...)
      - pattern-either:
          - patterns:
              - pattern: os.$METHOD($FILE, $BITS, ...)
              - metavariable-comparison:
                  comparison: $BITS >= 0o650 and $BITS < 0o100000
          - patterns:
              - pattern: os.$METHOD($FILE, $BITS)
              - metavariable-comparison:
                  comparison: $BITS >= 0o100650
          - patterns:
              - pattern: os.$METHOD($FILE, $BITS, ...)
              - metavariable-pattern:
                  metavariable: $BITS
                  patterns:
                    - pattern-either:
                        - pattern: <... stat.S_IWGRP ...>
                        - pattern: <... stat.S_IXGRP ...>
                        - pattern: <... stat.S_IWOTH ...>
                        - pattern: <... stat.S_IXOTH ...>
                        - pattern: <... stat.S_IRWXO ...>
                        - pattern: <... stat.S_IRWXG ...>
          - patterns:
              - pattern: os.$METHOD($FILE, $EXPR | $MOD, ...)
              - metavariable-comparison:
                  comparison: $MOD == 0o111
      - metavariable-pattern:
          metavariable: $METHOD
          patterns:
            - pattern-either:
                - pattern: chmod
                - pattern: lchmod
                - pattern: fchmod
    metadata:
      category: security
      owasp:
        - A01:2021 - Broken Access Control
      cwe:
        - "CWE-276: Incorrect Default Permissions"
      technology:
        - python
      references:
        - https://owasp.org/Top10/A01_2021-Broken_Access_Control
      cwe2022-top25: true
      cwe2021-top25: true
      subcategory:
        - vuln
      likelihood: LOW
      impact: MEDIUM
      confidence: MEDIUM
      license: Commons Clause License Condition v1.0[LGPL-2.1-only]
      vulnerability_class:
        - Improper Authorization