Vulnerability identifier: #VU85796

Vulnerability risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-23903

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GitLab Branch Source
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected plugin uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal. A remote attacker can use statistical methods to obtain a valid webhook token.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GitLab Branch Source: 684.vea_fa_7c1e2fe3

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.