CVE Vulnerability

CVE-2022-35929

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.

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/sigstore/cosign/commit/c5fda01a8ff33ca981f45a9f13e7fb6bd2080b94 Exploit Patch
https://github.com/sigstore/cosign/security/advisories/GHSA-vjxv-45g9-9296 Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:sigstore:cosign:*:*:*:*:*:*:*:*
Information

Published : 2022-08-04 07:15

Updated : 2022-08-10 06:38

NVD link : CVE-2022-35929

Mitre link : CVE-2022-35929

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature