MARIN3R: Cross-Namespace Vulnerability in the Operator

Summary

Cross-namespace Secret access vulnerability in DiscoveryServiceCertificate allows users to bypass RBAC and access Secrets in unauthorized namespaces.

Affected Versions

All versions prior to v0.13.4

Patched Versions

v0.13.4 and later

Impact

Users with permission to create DiscoveryServiceCertificate resources in one namespace can indirectly read Secrets from other namespaces, completely bypassing Kubernetes RBAC security boundaries.

Workarounds

Restrict DiscoveryServiceCertificate create permissions to cluster administrators only until patched version is deployed.

Credit

Thanks to @debuggerchen for the responsible disclosure.