#VU25100 Incorrect default permissions in GitLab Enterprise Edition - CVE-2020-7977

Vulnerability identifier: #VU25100

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-7977

CWE-ID: CWE-276

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 emote attacker to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for files and folders that are set by the application. A remote developer of a project can change the pipeline status of a protected branch to any value.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GitLab Enterprise Edition: 7.12.0 - 12.7.1

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External links
https://about.gitlab.com/blog/categories/releases/
https://about.gitlab.com/releases/2020/01/30/security-release-gitlab-12-7-4-released/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.