#VU84412 Improper Certificate Validation in GitLab Enterprise Edition - CVE-2023-6680

Vulnerability identifier: #VU84412

Vulnerability risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-6680

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

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

Vendor: GitLab, Inc

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper certificate validation issue in Smartcard authentication. A remote attacker can authenticate as another user given their public key if they use Smartcard authentication.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GitLab Enterprise Edition: 11.6.0 - 16.6.1

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External links
https://about.gitlab.com/releases/2023/12/13/security-release-gitlab-16-6-2-released/

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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.