CVE-2023-41040

Advisory

GitPython affected versions are vulnerable to Path Traversal (CWE-22). This vulnerability allows an attacker to potentially read arbitrary files from the system, which could lead to information disclosure or denial of service. The attack vector involves manipulating reference names to include path traversal sequences. The vulnerable functionality was in the handling of reference paths, which didn't properly validate user input. The initial fix was implemented with further security improvements in subsequent versions.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

GitPython is a python library used to interact with Git repositories. In order to resolve some git references, GitPython reads files from the `.git` directory, in some places the name of the file being read is provided by the user, GitPython doesn't check if this file is located outside the `.git` directory. This allows an attacker to make GitPython read any file from the system. This vulnerability is present in https://github.com/gitpython-developers/GitPython/blob/1c8310d7cae144f74a671cbe17e51f63a830adbf/git/refs/symbolic.py#L174-L175. That code joins the base directory with a user given string without checking if the final path is located outside the base directory. This vulnerability cannot be used to read the contents of files but could in theory be used to trigger a denial of service for the program. This issue has not yet been addressed. See CVE-2023-41040.


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

Resources

• https://github.com/gitpython-developers/GitPython/commit/e98f57b81f792f0f5e18d33ee658ae395f9aa3c4
• https://github.com/gitpython-developers/GitPython/commit/74e55ee4544867e1bd976b7df5a45869ee397b0b
• https://github.com/gitpython-developers/GitPython/blob/1c8310d7cae144f74a671cbe17e51f63a830adbf/git/refs/symbolic.py#L174-L175
• https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-cwvm-v4w8-q58c
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-41040
• https://lists.debian.org/debian-lts-announce/2023/09/msg00036.html