Vulnerability identifier: #VU31135

Vulnerability risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-20144

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gitlab Community Edition
Universal components / Libraries / Software for developers

Vendor: GitLab, Inc

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions. A remote attacker can send a specially crafted request and gain unauthorized access to the affected application.

Mitigation
Update to version 11.5.4.

Vulnerable software versions

Gitlab Community Edition: 11.5.0 - 11.5.3

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External links
http://about.gitlab.com/2018/12/13/critical-security-release-gitlab-11-dot-5-dot-4-released/
http://about.gitlab.com/blog/categories/releases/
http://gitlab.com/gitlab-org/gitlab-ce/issues/55200

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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. However, proof of concept for this vulnerability is available.