CVE-2023-29007 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2023-29007, an arbitrary configuration injection vulnerability via

git submodule deinit

in Git.

Understanding CVE-2023-29007

This section delves into the vulnerability's description, impact, affected systems, exploitation mechanism, and mitigation strategies.

What is CVE-2023-29007?

CVE-2023-29007 is an arbitrary configuration injection vulnerability in Git versions prior to 2.40.1. It allows attackers to inject malicious configuration into a user's configuration file, potentially leading to remote code execution.

The Impact of CVE-2023-29007

The vulnerability poses a high risk with a CVSS base score of 7, impacting the availability, confidentiality, and integrity of affected systems.

Technical Details of CVE-2023-29007

This section covers the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

A specially crafted

.gitmodules

file with long submodule URLs can exploit a bug in

config.c::git_config_copy_or_rename_section_in_file()

to inject arbitrary configuration values into a user's configuration file.

Affected Systems and Versions

Git versions prior to 2.40.1 are affected, including versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, and 2.39.3.

Exploitation Mechanism

Attackers can manipulate submodule URLs to execute remote code by injecting configuration values that specify executables to run.

Mitigation and Prevention

This section outlines immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Avoid running

git submodule deinit

on untrusted repositories or without inspecting submodule sections in the configuration file.

Long-Term Security Practices

Regularly update Git to patched versions and ensure secure configuration management practices to prevent arbitrary configuration injections.

Patching and Updates

Apply the available fix by updating to Git versions 2.40.1 or higher to mitigate the CVE-2023-29007 vulnerability.