#VU54086 Server-Side Request Forgery (SSRF) in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2021-22214

Vulnerability identifier: #VU54086

Vulnerability risk: High

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2021-22214

CWE-ID: CWE-918

Exploitation vector: Network

Exploit availability: Yes

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

Vendor: GitLab, Inc

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 10.5 - 13.12.1

GitLab Enterprise Edition: 10.5.0 - 13.12.0

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External links
http://gitlab.com/gitlab-org/gitlab/-/issues/322926
http://hackerone.com/reports/1110131
http://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22214.json

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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.