Description

Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.

Classification

CVE ID: CVE-2024-23903

Affected Products

Vendor: Jenkins Project

Product: Jenkins GitLab Branch Source Plugin

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.07% (probability of being exploited)

EPSS Percentile: 33.0% (scored less or equal to compared to others)

EPSS Date: 2025-03-14 (when was this score calculated)

References

https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-2871
http://www.openwall.com/lists/oss-security/2024/01/24/6

Timeline