Vulnerability identifier: #VU47330

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-77

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
gitlab-runner
Other software / Other software solutions

Vendor: GitLab, Inc
docs.gitlab.com

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The vulnerability exists due to improper input validation.on windows runner host. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary commands on the target system.

uccessful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 12.0.0 - 13.4.1

GitLab Enterprise Edition: 12.0.0 - 13.4.0

gitlab-runner: 12.0.2 - 13.4.1

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External links
http://about.gitlab.com/releases/2020/10/01/security-release-13-4-2-release/

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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.