Inconsistent interpretation of HTTP requests in GitLab Enterprise Edition - CVE-2020-6833

Vulnerability identifier: #VU25036

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2020-6833

CWE-ID: CWE-444

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: GitLab, Inc

Affected software:
GitLab Enterprise Edition

The vulnerability allows a remote attacker to perform HTTP request smuggling attack.

The vulnerability exists due to a particular header can be used to override restrictions. A remote attacker can send a specially crafted HTTP request and perform HTTP request smuggling attack, resulting in the GitLab Workhorse disclosing packages and files in the /tpm directory.

Install updates from vendor's website.

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