1) Permissions, Privileges, and Access Controls

Severity: Medium

CVSSv3: 5.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-8795

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Description

The vulnerability allows a remote attacker to gain unauthorized access to projects.

The vulnerability exists due to incorrect membership handling of group sharing feature. Sharing a group with another group could grant project access to unauthorized users.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Gitlab Community Edition: 12.5.0, 12.5.1, 12.5.2, 12.5.3, 12.5.4, 12.5.5, 12.5.6, 12.5.7, 12.5.9, 12.6.0, 12.6.1, 12.6.2, 12.6.3, 12.6.4, 12.6.6, 12.7.0, 12.7.1, 12.7.2, 12.7.4, 12.7.5

CPE

• cpe:/a:gitlab:gitlab:12.7.5:
• cpe:/a:gitlab:gitlab:12.7.4:
• cpe:/a:gitlab:gitlab:12.7.2:
• cpe:/a:gitlab:gitlab:12.7.1:
• cpe:/a:gitlab:gitlab:12.7.0:
• cpe:/a:gitlab:gitlab:12.6.6:
• cpe:/a:gitlab:gitlab:12.6.4:
• cpe:/a:gitlab:gitlab:12.6.3:
• cpe:/a:gitlab:gitlab:12.6.2:
• cpe:/a:gitlab:gitlab:12.6.1:
• cpe:/a:gitlab:gitlab:12.6.0:
• cpe:/a:gitlab:gitlab:12.5.9:
• cpe:/a:gitlab:gitlab:12.5.7:
• cpe:/a:gitlab:gitlab:12.5.6:
• cpe:/a:gitlab:gitlab:12.5.5:
• cpe:/a:gitlab:gitlab:12.5.4:
• cpe:/a:gitlab:gitlab:12.5.3:
• cpe:/a:gitlab:gitlab:12.5.2:
• cpe:/a:gitlab:gitlab:12.5.1:
• cpe:/a:gitlab:gitlab:12.5.0:

External links

https://about.gitlab.com/releases/2020/02/13/critical-security-release-gitlab-12-dot-7-dot-6-released/

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.