A Practical Guide to Python Supply Chain Security
This article discusses best practices for securing the Python supply chain, including using Ruff for linting, pinning dependencies with cryptographic hashes, running pip-audit in CI, and generating SBOMs with CycloneDX.
Why it matters
Securing the software supply chain is critical to prevent attacks and ensure the integrity of Python applications.
Key Points
- 1Use Ruff with security rules to catch bugs before shipping
- 2Pin dependencies with cryptographic hashes to prevent package swapping
- 3Run pip-audit in CI to catch known CVEs before production
- 4Generate SBOMs with CycloneDX to quickly identify affected packages
- 5Use Trusted Publishing with OIDC for package publishing
Details
The article emphasizes the importance of layering security controls in the Python supply chain. It recommends using Ruff for linting to catch bugs, pinning dependencies with cryptographic hashes to prevent package tampering, running pip-audit in CI to catch known vulnerabilities, and generating SBOMs with CycloneDX to quickly identify affected packages. For package publishing, the article suggests using Trusted Publishing with OIDC to generate attestations that link packages back to their source repositories. The author acknowledges that no single control is perfect, which is why layering multiple controls is crucial - when one fails, the others can catch it.
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