CVE-2022-35930: Ability to bypass attestation verification in sigstore PolicyController
PolicyController is a utility used to enforce supply chain policy in Kubernetes clusters. In versions prior to 0.2.1 PolicyController will report a false positive, resulting in an admission when it should not be admitted when there is at least one attestation with a valid signature and there are NO attestations of the type being verified (--type defaults to "custom"). An example image that can be used to test this is ghcr.io/distroless/static@sha256:dd7614b5a12bc4d617b223c588b4e0c833402b8f4991fb5702ea83afad1986e2. Users should upgrade to version 0.2.1 to resolve this issue. There are no workarounds for users unable to upgrade.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2022-35930?
CVE-2022-35930 is a vulnerability in the PolicyController utility used to enforce supply chain policy in Kubernetes clusters prior to version 0.2.1.
What is PolicyController?
PolicyController is a utility used to enforce supply chain policy in Kubernetes clusters.
What is the severity of CVE-2022-35930?
CVE-2022-35930 has a severity rating of 8.8 (high).
How does CVE-2022-35930 impact Sigstore Policy Controller?
CVE-2022-35930 impacts Sigstore Policy Controller versions prior to 0.2.1, causing false positives and admitting requests that should be denied.
How can I fix CVE-2022-35930?
To fix CVE-2022-35930, it is recommended to update Sigstore Policy Controller to version 0.2.1 or later.