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- Add scripts/agent.py and references/api-reference.md to all remaining skills - Update all 648 LICENSE files: copyright now reads 'Mahipal' - Add implementing-security-monitoring-with-datadog (new skill with full anatomy) - All 649 skills now have: SKILL.md, LICENSE, scripts/agent.py, references/api-reference.md
56 lines
1.8 KiB
Markdown
56 lines
1.8 KiB
Markdown
# API Reference: Securing GitHub Actions Workflows
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## Security Checks
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| Check | Risk | Severity |
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|-------|------|----------|
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| Unpinned actions (mutable tags) | Supply chain attack via tag overwrite | Medium |
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| Missing permissions block | Inherits overly broad defaults | Medium |
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| write-all permissions | Excessive token scope | High |
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| Script injection in run steps | Code execution via PR title/body | High |
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| pull_request_target trigger | Fork code runs with base permissions | High |
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| Secrets in workflow logs | Credential exposure | Critical |
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## Dangerous Expression Contexts
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| Context | Risk |
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|---------|------|
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| `github.event.pull_request.title` | Attacker-controlled PR title |
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| `github.event.pull_request.body` | Attacker-controlled PR body |
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| `github.event.issue.title` | Attacker-controlled issue title |
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| `github.event.comment.body` | Attacker-controlled comment |
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| `github.head_ref` | Attacker-controlled branch name |
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## SHA Pinning Format
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| Format | Security |
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|--------|----------|
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| `actions/checkout@v4` | Insecure - mutable tag |
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| `actions/checkout@b4ffde65f...` | Secure - immutable SHA |
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## Permission Scopes
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| Scope | Values |
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|-------|--------|
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| contents | read, write |
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| actions | read, write |
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| deployments | read, write |
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| id-token | write (for OIDC) |
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| security-events | write |
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| pull-requests | read, write |
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## Python Libraries
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| Library | Version | Purpose |
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|---------|---------|---------|
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| `yaml` | PyYAML >=6.0 | Parse workflow YAML |
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| `re` | stdlib | Pattern matching |
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| `json` | stdlib | Report output |
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| `pathlib` | stdlib | File discovery |
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## References
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- GitHub Actions Security Hardening: https://docs.github.com/en/actions/security-guides
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- StepSecurity Harden Runner: https://github.com/step-security/harden-runner
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- actionlint: https://github.com/rhysd/actionlint
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