Path traversal in GitPython

1) Path traversal

EUVDB-ID: #VU81056

Risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-41040

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when reading from the ".git" directory. A remote attacker can prepare a specially crafted ".git" file with directory traversal characters in file names and force the application to read these files from the local system. This can result in checking for existence of a specific files on the system or perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GitPython: 3.0.0 - 3.1.36

External links

http://github.com/gitpython-developers/GitPython/security/advisories/GHSA-cwvm-v4w8-q58c
http://github.com/gitpython-developers/GitPython/blob/1c8310d7cae144f74a671cbe17e51f63a830adbf/git/refs/symbolic.py#L174-L175

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.