| Package | Affected versions | Patched versions |
|---|---|---|
| chainguard.dev/apko | ≥ 0.14.8, < 1.1.0 | 1.1.0 |
| apko | ≥ 0.14.8, < 1.1.1 | 1.1.1 |
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. Merged into release.
Acknowledgements
apko thanks Oleh Konko from 1seal for discovering and reporting this issue.
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