GHSA-f67f-2j6r-m4c9

Non-constant time webhook token comparison in Jenkins GitLab Branch Source Plugin

Source: GitHub Advisory Database (reviewed) Low CVE-2024-23903

Packages

Ecosystem	Package	Affected	Fixed in
Maven	io.jenkins.plugins:gitlab-branch-source	< 688.v5fa	688.v5fa

Details

As written in the advisory (Markdown source, shown as plain text).

Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier does not use a constant-time comparison function when checking whether the provided and expected webhook token are equal. This could potentially allow attackers to use statistical methods to obtain a valid webhook token. GitLab Branch Source Plugin 688.v5fa_356ee8520 uses a constant-time comparison function when validating the webhook token.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2024-23903 advisory
https://github.com/jenkinsci/gitlab-branch-source-plugin/commit/8bfe1046cf342b99419457b9336addbbf346f89a web
https://github.com/jenkinsci/gitlab-branch-source-plugin package
https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-2871 web
http://www.openwall.com/lists/oss-security/2024/01/24/6 web