CVE-2018-11235 : What You Need to Know

Git before version 2.13.7, as well as versions 2.14.x before 2.14.4, 2.15.x before 2.15.2, 2.16.x before 2.16.4, and 2.17.x before 2.17.1, is vulnerable to remote code execution through a specially crafted .gitmodules file.

Understanding CVE-2018-11235

This CVE identifies a critical vulnerability in Git that allows for remote code execution.

What is CVE-2018-11235?

This vulnerability in Git arises when processing a malicious .gitmodules file, enabling the execution of arbitrary scripts on a system running the "git clone --recurse-submodules" command.

The Impact of CVE-2018-11235

The vulnerability permits remote attackers to execute arbitrary code on a target system, compromising its security and integrity.

Technical Details of CVE-2018-11235

Git's vulnerability to remote code execution is a critical security concern.

Vulnerability Description

The issue stems from processing a specially crafted .gitmodules file.
Submodule names sourced from this file are appended to the $GIT_DIR/modules path, leading to a directory traversal vulnerability.
This allows for the execution of post-checkout hooks from a submodule, bypassing security measures.

Affected Systems and Versions

Git versions before 2.13.7, 2.14.x before 2.14.4, 2.15.x before 2.15.2, 2.16.x before 2.16.4, and 2.17.x before 2.17.1 are vulnerable.

Exploitation Mechanism

Attackers exploit the vulnerability by manipulating the .gitmodules file to execute arbitrary scripts during the "git clone --recurse-submodules" command.

Mitigation and Prevention

Taking immediate action and implementing long-term security practices are crucial to mitigating the risks posed by CVE-2018-11235.

Immediate Steps to Take

Update Git to version 2.13.7 or later to patch the vulnerability.
Avoid executing the "git clone --recurse-submodules" command on untrusted repositories.

Long-Term Security Practices

Regularly monitor Git security advisories and update to the latest versions promptly.
Implement strict access controls and review submodule configurations for security vulnerabilities.

Patching and Updates

Apply patches provided by Git to address the vulnerability and enhance system security.