CVE-2022-35930CWE-347

Ability to bypass attestation verification in sigstore PolicyController

High · published August 4, 2022

CVSS v3.1
7.1
EPSS
1%
Percentile
52.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00696 · 52.5th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2022-08-04T21:15Z
EPSS history
Timeline
  • 04 AUG 21:15Z
    Ability to bypass attestation verification in sigstore PolicyController
    cvelistv5