Security restrictions bypass in GitLab

1) Improper Authentication

EUVDB-ID: #VU49939

Risk: Medium

CVSSv4.0: 5.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote user to bypass authentication process.

The vulnerability exists due to incorrect patch for #VU49353. A remote user can steal a user's API access token through Gitlab pages, bypass the authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 13.0.0 - 13.7.3

GitLab Enterprise Edition: 13.0.0 - 13.7.3

CPE2.3

• cpe:2.3:a:gitlab:gitlab:13.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:13.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab:13.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab-ee:13.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab-ee:13.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:gitlab:gitlab-ee:13.0.3:*:*:*:*:*:*:*

External links

https://about.gitlab.com/releases/2021/01/14/critical-security-release-gitlab-13-7-4-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.