PT-2024-19012 · Ursa · Ursa

Published 2024-01-16 · Updated 2024-01-24 · CVE-2024-21670

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Ursa (affected versions not specified)

Description The revocation schema in Ursa's CL-Signatures implementations has a flaw that could impact the privacy guarantees defined by the AnonCreds verifiable credential model. This flaw allows a malicious holder of a revoked credential to generate a valid Non-Revocation Proof for that credential as part of an AnonCreds presentation. A verifier may verify a credential from a holder as being "not revoked" when in fact, the holder's credential has been revoked.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use of a Broken Cryptographic Algorithm

Weakness Enumeration

CWE-327

Related Identifiers

CVE-2024-21670

GHSA-R78F-4Q2Q-HVV4

Affected Products

Ursa

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21670.json · Exploit
• https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-21670 · Security Note
• https://osv.dev/vulnerability/GHSA-r78f-4q2q-hvv4 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-21670 · Vendor Advisory
• https://github.com/hyperledger-archives/ursa · Note
• https://twitter.com/CVEnew/status/1747386037100233000 · Twitter Post
• https://t.me/cvenotify/68570 · Telegram Post