CVE-2022-35930

Ability to bypass attestation verification in sigstore PolicyController

Description

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.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.07%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: sigstore policy-controller
Published at:
Updated at:

References

Link Tags
https://github.com/sigstore/policy-controller/security/advisories/GHSA-739f-hw6h-7wq8 third party advisory
https://github.com/sigstore/policy-controller/commit/e852af36fb7d42678b21d7e97503c25bd1fd05c8 third party advisory patch
https://github.com/sigstore/policy-controller/releases/tag/v0.2.1 third party advisory

Frequently Asked Questions

What is the severity of CVE-2022-35930?
CVE-2022-35930 has been scored as a high severity vulnerability.
How to fix CVE-2022-35930?
To fix CVE-2022-35930, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-35930 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-35930 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-35930?
CVE-2022-35930 affects sigstore policy-controller.
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