CVE-2019-19604 : Exploit Details and Defense Strategies

Git before versions 2.20.2, 2.21.x before 2.21.1, 2.22.x before 2.22.2, 2.23.x before 2.23.1, and 2.24.x before 2.24.1 allows for the execution of arbitrary commands due to a vulnerability in the "git submodule update" operation.

Understanding CVE-2019-19604

This CVE involves a security vulnerability in Git that allows malicious repositories to execute arbitrary commands.

What is CVE-2019-19604?

In versions prior to 2.20.2, 2.21.x before 2.21.1, 2.22.x before 2.22.2, 2.23.x before 2.23.1, and 2.24.x before 2.24.1, Git permits the execution of arbitrary commands through a specific operation.

The Impact of CVE-2019-19604

This vulnerability enables attackers to run arbitrary commands via the "git submodule update" operation, posing a significant security risk to affected systems.

Technical Details of CVE-2019-19604

Git CVE-2019-19604 involves the following technical aspects:

Vulnerability Description

The vulnerability allows for the execution of arbitrary commands due to a flaw in the handling of the .gitmodules file in a malicious repository.

Affected Systems and Versions

Versions prior to 2.20.2
2.21.x before 2.21.1
2.22.x before 2.22.2
2.23.x before 2.23.1
2.24.x before 2.24.1

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting malicious commands into the .gitmodules file of a repository, triggering their execution during a "git submodule update" operation.

Mitigation and Prevention

To address CVE-2019-19604, consider the following mitigation strategies:

Immediate Steps to Take

Upgrade Git to version 2.20.2, 2.21.1, 2.22.2, 2.23.1, or 2.24.1 to mitigate the vulnerability.
Avoid interacting with untrusted repositories or sources.

Long-Term Security Practices

Regularly update Git to the latest version to patch known vulnerabilities.
Implement strict access controls and review permissions for repository interactions.

Patching and Updates

Apply patches provided by Git to fix the vulnerability.
Stay informed about security advisories and updates from Git to protect against emerging threats.