Medium severity6.5NVD Advisory· Published Jan 16, 2024· Updated Jun 17, 2026
CVE-2024-21670
CVE-2024-21670
Description
Ursa is a cryptographic library for use with blockchains. The revocation schema that is part of the Ursa CL-Signatures implementations has a flaw that could impact the privacy guarantees defined by the AnonCreds verifiable credential model, allowing a malicious holder of a revoked credential to generate a valid Non-Revocation Proof for that credential as part of an AnonCreds presentation. A verifier may verify a credential from a holder as being "not revoked" when in fact, the holder's credential has been revoked. Ursa has moved to end-of-life status and no fix is expected.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
ursacrates.io | <= 0.3.7 | — |
anoncreds-clsignaturescrates.io | >= 0 | — |
Affected products
4cpe:2.3:a:hyperledger:ursa:0.1.0:*:*:*:*:rust:*:*+ 1 more
- cpe:2.3:a:hyperledger:ursa:0.1.0:*:*:*:*:rust:*:*
- (no CPE)range: <= 0.3.7
- ghsa-coords2 versions
>= 0+ 1 more
- (no CPE)range: >= 0
- (no CPE)range: <= 0.3.7
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-r78f-4q2q-hvv4ghsaADVISORY
- github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2024-21670ghsaADVISORY
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