CVE-2022-24826 Explained : Impact and Mitigation

Git LFS, a large file storage extension for Git, has a critical security vulnerability on Windows that allows the execution of arbitrary code from the current directory when certain conditions are met.

Understanding CVE-2022-24826

This vulnerability in Git LFS poses a significant risk to Windows systems by enabling attackers to execute malicious code under specific circumstances.

What is CVE-2022-24826?

The vulnerability arises when Git LFS operates on a compromised repository on Windows and attempts to execute a program not found in the system's PATH. This flaw allows the execution of arbitrary code by manipulating file extensions and directory paths.

The Impact of CVE-2022-24826

With a CVSS base score of 9.8 (Critical), this vulnerability has a high impact on confidentiality, integrity, and availability. It requires no special privileges and can be exploited remotely, posing a severe threat to affected systems.

Technical Details of CVE-2022-24826

The following technical details shed light on the nature of this security vulnerability:

Vulnerability Description

Git LFS on Windows may execute unintended programs from the current working directory due to an issue in the Go

os/exec

package, allowing attackers to run arbitrary code.

Affected Systems and Versions

The vulnerability affects Git LFS version 2.12.1 and below, while it is patched in version 3.1.3. Windows systems are specifically at risk, while Unix systems remain unaffected.

Exploitation Mechanism

By manipulating file names and paths within a malicious repository, an attacker can trigger the execution of arbitrary code by Git LFS on Windows, bypassing the system's PATH settings.

Mitigation and Prevention

To address the CVE-2022-24826 vulnerability, users and administrators should take the following steps:

Immediate Steps to Take

Upgrade Git LFS to version 3.1.3 to patch the security issue.
Avoid operating Git LFS on untrusted or compromised repositories to prevent exploitation.

Long-Term Security Practices

Regularly update and maintain software to ensure the latest security patches are applied.
Implement strict access controls and security policies to minimize the risk of code execution from untrusted sources.

Patching and Updates

Git LFS has resolved this vulnerability in version 3.1.3. Users of affected versions are strongly advised to upgrade to the patched version to mitigate the security risk.