CVE-2022-36056
Assigner: GitHub_M
Published: 2022-09-14T19:50:09
State: PUBLISHED
affected: product: cosign
vendor: sigstore
versions: status: affected
version: < 1.12.0
descriptions: value: 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.
metrics: cvssV3_1: attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: NONE
baseScore: 5.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
version: 3.1
problemTypes: descriptions: cweId: CWE-347
description: CWE-347: Improper Verification of Cryptographic Signature
type: CWE
source: advisory: GHSA-8gw7-4j42-w388
discovery: UNKNOWN
title:  Vulnerabilities with blob verification in sigstore cosign