GHSA-9m43-p3cx-w8j5 malcontent OCI image pull credential exfiltration via malicious registry token realm

• Go github.com/chainguard-dev/malcontent: >= 0.10.0, < 1.20.3 → fixed in 1.20.3

Malcontent could be made to expose Docker registry credentials if it scanned a specially crafted OCI image reference. Malcontent uses google/go-containerregistry for OCI image pulls, which by default uses the Docker credential keychain. A malicious registry could return a `WWW-Authenticate` header redirecting token authentication to an attacker-controlled endpoint, causing credentials to be sent to that endpoint. Fix: Default to anonymous auth for OCI pulls Acknowledgements Thank you to Oleh Konko from 1seal for discovering and reporting this issue.