CVE-2022-35929
cosign: `cosign verify-attestation --type` can report a false positive if any attestation exists
Severity by source
Trivy's own label is CRITICAL. Rated critical by NVD, Bitnami. Rated lower by GHSA (high), Red Hat (medium).
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | cosign | 1.10.1 |
| alpine 3.16 | cosign | 1.10.1-r0 |
| alpine 3.17 | cosign | 1.10.1-r0 |
| alpine 3.18 | cosign | 1.10.1-r0 |
| alpine 3.19 | cosign | 1.10.1-r0 |
| alpine 3.20 | cosign | 1.10.1-r0 |
| alpine 3.21 | cosign | 1.10.1-r0 |
| alpine 3.22 | cosign | 1.10.1-r0 |
| alpine 3.23 | cosign | 1.10.1-r0 |
| alpine 3.24 | cosign | 1.10.1-r0 |
| alpine edge | cosign | 1.10.1-r0 |
| go::GitHub Security Advisory Go | github.com/sigstore/cosign | 1.10.1 |
References
- https://access.redhat.com/security/cve/CVE-2022-35929
- https://github.com/sigstore/cosign
- https://github.com/sigstore/cosign/commit/c5fda01a8ff33ca981f45a9f13e7fb6bd2080b94
- https://github.com/sigstore/cosign/security/advisories/GHSA-vjxv-45g9-9296
- https://nvd.nist.gov/vuln/detail/CVE-2022-35929
- https://www.cve.org/CVERecord?id=CVE-2022-35929