Remote code execution in GitLab

1) Improper access control

EUVDB-ID: #VU51624

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 - Improper Access Control

Exploit availability: Yes

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

CPE2.3

• cpe:2.3:a:gitlab:gitlab:13.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:13.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:13.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab-ee:13.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab-ee:13.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab-ee:13.2.3:*:*:*:*:*:*:*

External links

https://about.gitlab.com/releases/2021/03/17/security-release-gitlab-13-9-4-released/

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.