CVE-2024-21670
low-risk
Published 2024-01-16
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 A verifier may verify a credential from a holder as being "not revoked" when in fact, the holder's credential has been revoked.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.
Do I need to act?
-
0.12% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10
Medium
PHYSICAL
/ HIGH complexity
Affected Products (1)
Ursa
Affected Vendors
References (2)
23
/ 100
low-risk
Severity
17/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal