Vulnerability identifier: #VU83610

Vulnerability risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-5226

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gitlab Community Edition
Universal components / Libraries / Software for developers
GitLab Enterprise Edition
Universal components / Libraries / Software for developers

Vendor: GitLab, Inc

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions within the main branch of a repository with a specially designed name. A remote user can use a specially crafted branch name to bypass prohibited branch checks and manipulate repository content in the UI.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 0.1.5 - 16.6.0

GitLab Enterprise Edition: 6.2.0 - 16.6.0

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External links
http://about.gitlab.com/releases/2023/11/30/security-release-gitlab-16-6-1-released/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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