#VU51624 Improper access control in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2021-22192

Vulnerability identifier: #VU51624

Vulnerability risk: Medium

CVSSv4.0: 7.4 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-22192

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: Yes

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 user to execute arbitrary code on the system.

The vulnerability exists due to improper access restrictions. A remote authenticated user can bypass implemented security restrictions and execute arbitrary code on the server via unsafe user-controlled markdown rendering options.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 13.2.0 - 13.9.3

GitLab Enterprise Edition: 13.2.0 - 13.9.3

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External links
https://about.gitlab.com/releases/2021/03/17/security-release-gitlab-13-9-4-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. However, proof of concept for this vulnerability is available.