GHSA-5g94-c2wx-8pxw
apko has a path traversal in apko dirFS which allows filesystem writes outside base
Quick fix
GHSA-5g94-c2wx-8pxw — chainguard.dev/apko: upgrade to the fixed version with the command below.
go get chainguard.dev/apko@v1.1.0Details
A Path Traversal vulnerability was discovered in apko's dirFS filesystem abstraction. An attacker who can supply a malicious APK package (e.g., via a compromised or typosquatted repository) could create directories or symlinks outside the intended installation root. The MkdirAll, Mkdir, and Symlink methods in pkg/apk/fs/rwosfs.go use filepath.Join() without validating that the resulting path stays within the base directory.
**Fix:** Fixed by [d8b7887](https://github.com/chainguard-dev/apko/commit/d8b7887a968a527791b3c591ae83928cb49a9f14). Merged into release.
**Acknowledgements** apko thanks Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.
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