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.

CVSS v3.0 9.8 CRITICAL

9.8^/10

CVSS v3.0 : CRITICAL

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 Third Party Advisory
https://github.com/sigstore/cosign/security/advisories/GHSA-vjxv-45g9-9296	Exploit Third Party Advisory

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Configurations

Configuration 1 (hide)

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

Information

Published : 2022-08-04 12:15

Updated : 2022-08-10 11:38

NVD link : CVE-2022-35929

Mitre link : CVE-2022-35929

JSON object : View

CWE

CWE-347

Improper Verification of Cryptographic Signature

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Products Affected

sigstore

cosign

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