CVE-2024-23903: github branch — Fix

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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-697 CWE-697

Affected Products

Vendor	Product	Versions
jenkins	github_branch_source	< 684.vea_fa_7c1e2fe3

References

Advisories & Patches

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

Other References

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

Frequently Asked Questions

What is CVE-2024-23903? +

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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-23903? +

CVE-2024-23903 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-23903? +

CVE-2024-23903 affects products from jenkins, specifically: github_branch_source. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-23903? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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