CVE-2024-21670
Ursa AnonCreds Revocation Schema Privacy Breach
Description
Ursa is a cryptographic library for use with blockchains. The revocation schema 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, allowing 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 A verifier may verify a credential from a holder as being "not revoked" when in fact, the holder's credential has been revoked. Ursa has moved to end-of-life status and no fix is expected.
INFO
Published Date :
Jan. 16, 2024, 10:15 p.m.
Last Modified :
Jan. 24, 2024, 6:14 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.2
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-21670.
| URL | Resource |
|---|---|
| https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4 | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-21670 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-21670 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jan. 24, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4 No Types Assigned https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4 Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:hyperledger:ursa:0.1.0:*:*:*:*:rust:*:* -
CVE Received by [email protected]
Jan. 16, 2024
Action Type Old Value New Value Added Description Ursa is a cryptographic library for use with blockchains. The revocation schema 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, allowing 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. Ursa has moved to end-of-life status and no fix is expected. Added Reference GitHub, Inc. https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4 [No types assigned] Added CWE GitHub, Inc. CWE-327 Added CVSS V3.1 GitHub, Inc. AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-21670 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-21670
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.05%
score
0.38443
percentile