GitPython path traversal

Summaryinfo

A vulnerability described as critical has been identified in GitPython. Affected by this issue is some unknown functionality. The manipulation results in path traversal. This vulnerability is cataloged as CVE-2023-41040. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in GitPython (Programming Language Software) (unknown version). Affected is an unknown code block. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. CVE summarizes:

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.

The weakness was shared 08/31/2023 as GHSA-cwvm-v4w8-q58c. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-41040 since 08/22/2023. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability scanner Nessus provides a plugin with the ID 209877 (Debian dla-3939 : python-git-doc - security update), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (209877). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Programming Language Software

Name

• GitPython

CPE 2.3info

• 🔍

CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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