Prevent script injection attack in GitHub Actions #3953
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Information in the github context should be treated as untrusted user input and is therefore unsafe to interpolate into scripts. Instead, mitigate their damage by using an intermediate environment variable instead. See GHSA-7x29-qqmq-v6qc and https://docs.github.com/en/actions/security-for-github-actions/security-guides/security-hardening-for-github-actions#understanding-the-risk-of-script-injections
lurch
reviewed
Dec 7, 2024
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| echo "Current ref: $GITHUB_REF" | ||
| echo "Base ref: $GITHUB_BASE_REF" | ||
| echo "Head ref: $GITHUB_HEAD_REF" | ||
| echo "Repository: $GITHUB_REPOSITORY" | ||
| echo "Head repository: ${{ github.event.pull_request.head.repo.full_name }}" | ||
| echo "Head repository: $REPO_FULL_NAME" |
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Looks like these echo commands were probably only used when we were initially debugging this workflow, so perhaps this entire "Log current branches and repositories" could / should also be deleted? 🤔
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Information in the github context should be treated as untrusted user input and is therefore unsafe to interpolate into scripts. Instead, mitigate their damage by using an intermediate environment variable instead.
See GHSA-7x29-qqmq-v6qc and https://docs.github.com/en/actions/security-for-github-actions/security-guides/security-hardening-for-github-actions#understanding-the-risk-of-script-injections