CVE-2024-22192: ursa Weak Crypto — Fix

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.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-327 CWE-327

Affected Products

Vendor	Product	Versions
hyperledger	ursa	All

References

Advisories & Patches

https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-6698-mhxx-r84g https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-6698-mhxx-r84g

Frequently Asked Questions

What is CVE-2024-22192? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-22192? +

CVE-2024-22192 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-22192? +

CVE-2024-22192 affects products from hyperledger, specifically: ursa. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-22192? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-22192