CVE-2024-23903

low-risk

Published 2024-01-24

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.

Do I need to act?

0.08% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.3/10 Medium

NETWORK / LOW complexity

Affected Products (1)

Github Branch Source

Affected Vendors

Jenkins

References (4)

Mailing List http://www.openwall.com/lists/oss-security/2024/01/24/6

Vendor Advisory https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-2871

Mailing List http://www.openwall.com/lists/oss-security/2024/01/24/6

Vendor Advisory https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-2871

/ 100

low-risk

Severity 21/34 · High

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal