CVE-2024-22192: Ursa CL-Signatures Revocation allows verifiers to generate unique identifiers for holders

January 16, 2024 (updated January 19, 2024)

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.

References

github.com/advisories/GHSA-6698-mhxx-r84g
github.com/hyperledger-archives/ursa
github.com/hyperledger-archives/ursa/security/advisories/GHSA-6698-mhxx-r84g
github.com/hyperledger/anoncreds-clsignatures-rs/commit/1e55780c890b027fa51e361e188a7743a0bf473f
nvd.nist.gov/vuln/detail/CVE-2024-22192

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