CVE-2022-35929

Public Exploit
False positive signature verification in cosign

Description

cosign is a container signing and verification utility. In versions prior to 1.10.1 cosign can report a false positive if any attestation exists. `cosign verify-attestation` used with the `--type` flag will report a false positive verification 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"). This can happen when signing with a standard keypair and with "keyless" signing with Fulcio. This vulnerability can be reproduced with the `distroless.dev/static@sha256:dd7614b5a12bc4d617b223c588b4e0c833402b8f4991fb5702ea83afad1986e2` image. This image has a `vuln` attestation but not an `spdx` attestation. However, if you run `cosign verify-attestation --type=spdx` on this image, it incorrectly succeeds. This issue has been addressed in version 1.10.1 of cosign. Users are advised to upgrade. There are no known workarounds for this issue.

Category

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

References

Link Tags
https://github.com/sigstore/cosign/security/advisories/GHSA-vjxv-45g9-9296 third party advisory exploit
https://github.com/sigstore/cosign/commit/c5fda01a8ff33ca981f45a9f13e7fb6bd2080b94 patch third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2022-35929?
CVE-2022-35929 has been scored as a high severity vulnerability.
How to fix CVE-2022-35929?
To fix CVE-2022-35929, 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-2022-35929 being actively exploited in the wild?
It is possible that CVE-2022-35929 is being exploited or will be exploited in a near future based on public information. 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-2022-35929?
CVE-2022-35929 affects sigstore cosign.
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