CVE-2019-1348 : Security Advisory and Response

A problem was discovered in Git versions prior to v2.24.1, v2.23.1, v2.22.2, v2.21.1, v2.20.2, v2.19.3, v2.18.2, v2.17.3, v2.16.6, v2.15.4, and v2.14.6. The vulnerability allows for Remote Code Execution through the --export-marks option of git fast-import.

Understanding CVE-2019-1348

This CVE affects Git versions before specific releases, enabling unauthorized modification of paths.

What is CVE-2019-1348?

CVE-2019-1348 is a vulnerability in Git versions prior to v2.24.1, allowing Remote Code Execution through the --export-marks option of git fast-import.

The Impact of CVE-2019-1348

The vulnerability permits attackers to modify paths without restrictions, potentially leading to unauthorized code execution.

Technical Details of CVE-2019-1348

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The --export-marks option of git fast-import is accessible through the in-stream command feature, enabling unauthorized path modifications.

Affected Systems and Versions

Product: Git
Vendor: Microsoft Corporation
Versions affected: Before 2.24.1, 2.23.1, 2.22.2, 2.21.1, 2.20.2, 2.19.3, 2.18.2, 2.17.3, 2.16.6, 2.15.4, 2.14.6

Exploitation Mechanism

The vulnerability allows attackers to exploit the --export-marks option of git fast-import, potentially leading to Remote Code Execution.

Mitigation and Prevention

Protect your systems from CVE-2019-1348 with the following steps:

Immediate Steps to Take

Update Git to version 2.24.1 or later to mitigate the vulnerability.
Monitor for any unauthorized path modifications.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement access controls to restrict unauthorized modifications.

Patching and Updates

Apply patches provided by Git to address the vulnerability.