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Alpine Linux: CVE-2022-36056: Improper Verification of Cryptographic Signature

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Alpine Linux: CVE-2022-36056: Improper Verification of Cryptographic Signature

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:C/A:N)
Published
09/14/2022
Created
08/23/2024
Added
08/22/2024
Modified
10/02/2024

Description

Cosign is a project under the sigstore organization which aims to make signatures invisible infrastructure. In versions prior to 1.12.0 a number of vulnerabilities have been found in cosign verify-blob, where Cosign would successfully verify an artifact when verification should have failed. First a cosign bundle can be crafted to successfully verify a blob even if the embedded rekorBundle does not reference the given signature. Second, when providing identity flags, the email and issuer of a certificate is not checked when verifying a Rekor bundle, and the GitHub Actions identity is never checked. Third, providing an invalid Rekor bundle without the experimental flag results in a successful verification. And fourth an invalid transparency log entry will result in immediate success for verification. Details and examples of these issues can be seen in the GHSA-8gw7-4j42-w388 advisory linked. Users are advised to upgrade to 1.12.0. There are no known workarounds for these issues.

Solution(s)

  • alpine-linux-upgrade-cosign

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