https://bugzilla.suse.com/show_bug.cgi?id=1232903 Bug ID: 1232903 Summary: VUL-0: CVE-2024-51746: gitsign: use of incorrect Rekor entries during online verification when multiple entries are returned by the log Classification: openSUSE Product: openSUSE Distribution Version: Leap 15.6 Hardware: Other URL: https://smash.suse.de/issue/427094/ OS: Other Status: NEW Severity: Minor Priority: P5 - None Component: Security Assignee: opensuse_buildservice@ojkastl.de Reporter: smash_bz@suse.de QA Contact: security-team@suse.de CC: camila.matos@suse.com Target Milestone: --- Found By: Security Response Team Blocker: --- Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. gitsign may select the wrong Rekor entry to use during online verification when multiple entries are returned by the log. gitsign uses Rekor's search API to fetch entries that apply to a signature being verified. The parameters used for the search are the public key and the payload. The search API returns entries that match either condition rather than both. When gitsign's credential cache is used, there can be multiple entries that use the same ephemeral keypair / signing certificate. As gitsign assumes both conditions are matched by Rekor, there is no additional validation that the entry's hash matches the payload being verified, meaning that the wrong entry can be used to successfully pass verification. Impact is minimal as while gitsign does not match the payload against the entry, it does ensure that the certificate matches. This would need to be exploited during the certificate validity window (10 minutes) by the key holder. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-51746 https://www.cve.org/CVERecord?id=CVE-2024-51746 https://github.com/sigstore/gitsign/security/advisories/GHSA-8pmp-678w-c8xx https://bugzilla.redhat.com/show_bug.cgi?id=2323965 -- You are receiving this mail because: You are on the CC list for the bug.