CVE-2024-21670
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-21670
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-21670.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-21670
- Aliases
- Published
- 2024-01-16T21:44:05Z
- Modified
- 2025-10-21T19:33:13Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N CVSS Calculator
- Summary
- CL-Signatures Revocation Scheme in Ursa has flaws that allow a holder to demonstrate non-revocation of a revoked credential
- Details
-
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 A verifier may verify a credential from a holder as being "not revoked" when in fact, the holder's credential has been revoked.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.
- Database specific
{ "cwe_ids": [ "CWE-327" ] }- References