Privilege escalation in Git

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU65287

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-29187

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

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions. A remote user can bypass implemented security restrictions and privilege escalation on the system when navigating as root into a shared tmp directory owned by the victim, but where an attacker can create a git repository.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Git: 2.30.0 - 2.37.0

External links

http://github.blog/2022-04-12-git-security-vulnerability-announced
http://lore.kernel.org/git/xmqqv8s2fefi.fsf@gitster.g/T/#u
http://github.com/git/git/security/advisories/GHSA-j342-m5hw-rr3v

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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