Ursa CL-Signatures Revocation allows verifiers to generate unique identifiers for holders
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-327.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| hyperledger-archives | ursa | up to 0.3.7 | — | No fix listed | CNA |
| — | ursa (crates.io) | up to 0.3.7 | — | No fix listed | GHSA-6698-mhxx-r84g |
| — | anoncreds-clsignatures (crates.io) | before 0.1.0 | 0.1.0 | Patch available | GHSA-6698-mhxx-r84g |
- ursa Vendorhyperledger-archives Affected up to 0.3.7 Fixed in — No fix listed CNA
- ursa (crates.io) Vendor— Affected up to 0.3.7 Fixed in — No fix listed GHSA-6698-mhxx-r84g
- anoncreds-clsignatures (crates.io) Vendor— Affected before 0.1.0 Fixed in 0.1.0 Patch available GHSA-6698-mhxx-r84g
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hyperledger:ursa:0.1.0:*:*:*:*:rust:*:* | 0.1.0 | Vulnerable | hyperledger |
- cpe:2.3:a:hyperledger:ursa:0.1.0:*:*:*:*:rust:*:* Versions 0.1.0 Vulnerable ·hyperledger
Remediation
- Fix · GHSA-6698-mhxx-r84g anoncreds-clsignatures (crates.io) Fixed in 0.1.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-22192
- 2026-10-03 Alias added: GHSA-6698-mhxx-r84g
References
More hyperledger Ursa vulnerabilities
- TI-2022-13066 Unlinkability broken in ursa when verifiers use malicious keys CVSS 3.1MEDIUM 5.3
- TI-2024-14391 Broken or risky cryptographic algorithm in hyperledger-archives ursa CVSS 3.1HIGH 8.1
Sources
- CVE-2024-22192 · CVE Program
- CVE-2024-22192 · NVD
- FIRST EPSS
- GHSA-6698-mhxx-r84g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences