Vulnerability in Sigstore Policy-Controller
CVE-2022-35930
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (49.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000
Affected products
- Sigstore Policy-Controller — versions < 0.2.1
- Sigstore Policy Controller
Weakness classification (CWE)
References
- github.com/sigstore/policy-controller/security/advisories/GHSA-739f-hw6h-7wq8 (Third Party Advisory)
- github.com/sigstore/policy-controller/commit/e852af36fb7d42678b21d7e97503c25bd1… (Patch, Third Party Advisory)
- github.com/sigstore/policy-controller/releases/tag/v0.2.1 (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-35930?
- CVE-2022-35930 is a high-severity vulnerability in Sigstore Policy-Controller, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.1/10. Published 2022-08-04.
- How severe is CVE-2022-35930?
- High severity. CVSS v3 base score is 7.1 out of 10.