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.
References (3)
Core 3
Core References
Third Party Advisory x_refsource_confirm
https://github.com/sigstore/policy-controller/security/advisories/GHSA-739f-hw6h-7wq8
Patch, Third Party Advisory x_refsource_misc
https://github.com/sigstore/policy-controller/commit/e852af36fb7d42678b21d7e97503c25bd1fd05c8
Third Party Advisory x_refsource_misc
https://github.com/sigstore/policy-controller/releases/tag/v0.2.1
Scores
CVSS v3
7.1
EPSS
0.0022
EPSS Percentile
43.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-347
Status
published
Products (2)
sigstore/policy-controller
0 - 0.2.1Go
sigstore/policy_controller
< 0.2.1
Published
Aug 04, 2022
Tracked Since
Feb 18, 2026