Kyverno before 1.19.2 Image Verification Bypass via Attestation Type Panic

Summary

Kyverno before 1.19.2 contains an unchecked type assertion in buildStatementMap that allows unauthenticated attackers to crash the policy engine via crafted attestation statements. Attackers can push an OCI referrer manifest with a non-string type field to bypass image verification under failurePolicy Ignore or crash-loop the reports-controller.

Remediation

1. Inventory every kyverno kyverno deployment, including staging.
2. Upgrade kyverno kyverno to 1.19.2.
3. Confirm the running version after the upgrade.

References

• Advisoryhttps://github.com/kyverno/kyverno/security/advisories/GHSA-24cc-9745-hxfc
• Advisoryhttps://www.vulncheck.com/advisories/kyverno-before-1.19.2-image-verification-bypass-via-attestation-type-panic