10 Nov 2023
Vulnérabilité CVE-2023-47122 CVE Vulnerability
Gitsign is software for keyless Git signing using Sigstore. In versions of gitsign starting with 0.6.0 and prior to 0.8.0, Rekor public keys were fetched via the Rekor API, instead of through the local TUF client. If the upstream Rekor server happened to be compromised, gitsign clients could potentially be tricked into trusting incorrect signatures. There is no known compromise the default public good instance (`rekor.sigstore.dev`) - anyone using this instance is unaffected. This issue was fixed in v0.8.0. No known workarounds are available. (CVSS:4.2) (Last Update:2023-11-10 22:15:14)
Vulnerability Details :
Gitsign is software for keyless Git signing using Sigstore. In versions of gitsign starting with 0.6.0 and prior to 0.8.0, Rekor public keys were fetched via the Rekor API, instead of through the local TUF client. If the upstream Rekor server happened to be compromised, gitsign clients could potentially be tricked into trusting incorrect signatures. There is no known compromise the default public good instance (`rekor.sigstore.dev`) - anyone using this instance is unaffected. This issue was fixed in v0.8.0. No known workarounds are available.
Exploit prediction scoring system (EPSS) score for CVE-2023-47122
We don't have an EPSS score for this CVE yet EPSS FAQ
CVSS scores for CVE-2023-47122
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
---|---|---|---|---|---|
4.2 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N | 0.5 | 3.6 | Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. |
CWE ids for CVE-2023-47122
- The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by: Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. (Secondary)
References for CVE-2023-47122
- https://docs.sigstore.dev/about/threat-model/#sigstore-threat-model Threat Model - Sigstore
- https://github.com/sigstore/gitsign/commit/cd66ccb03c86a3600955f0c15f6bfeb75f697236 Add options for Rekor client, make public key fetcher configurable. (… · sigstore/gitsign@cd66ccb · GitHub
- https://github.com/sigstore/gitsign/security/advisories/GHSA-xvrc-2wvh-49vc Rekor public keys fetched from upstream API instead of local TUF client. · Advisory · sigstore/gitsign · GitHub
- https://github.com/sigstore/gitsign/pull/399 Add options for Rekor client, make public key fetcher configurable. by wlynch · Pull Request #399 · sigstore/gitsign · GitHub