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

What is CVE-2024-22192?

CVE-2024-22192 is a medium-severity vulnerability in hyperledger-archives ursa, published on 16 Jan 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

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.

Weakness: CWE-327

Which versions are affected by CVE-2024-22192?

4 open source packages ship an affected version, including ursa and anoncreds-clsignatures. It affects 1 product.

Products include Hyperledger Ursa.

How do I fix CVE-2024-22192?

Product is end of life, replace it.

Is CVE-2024-22192 being exploited?

There is no known exploitation of CVE-2024-22192 in the wild and no public exploit code.

Other vulnerabilities in hyperledger-archives ursa

• CVE-2024-21670 CL-Signatures Revocation Scheme in Ursa has flaws that allow a holder to demonstrate non-revocation of a revoked credential Medium 6.5
• CVE-2022-31021 Unlinkability broken in ursa when verifiers use malicious keys Low 3.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-6698-mhxx-r84g.