Vulnerability · Published Jan 16, 2024 · Assigned by GitHub_M
CVE-2024-22192Ursa CL-Signatures Revocation allows verifiers to generate unique identifiers for holders
Medium 6.5
In plain English
A medium-severity broken cryptography in ursa from hyperledger-archives. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).
Official description
Ursa is a cryptographic library for use with blockchains. The revocation scheme 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. Notably, a malicious verifier may be able to generate a unique identifier for a holder providing a verifiable presentation that includes a Non-Revocation proof. The impact of the flaw is that a malicious verifier may be able to determine a unique identifier for a holder presenting a Non-Revocation proof. Ursa has moved to end-of-life status and no fix is expected.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| hyperledger-archives | ursa | <= 0.3.7 |
Weakness: CWE-327 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N