CVE-2023-51664 : Exploit Details and Defense Strategies

A GitHub security advisory has been issued for CVE-2023-51664 related to tj-actions/changed-files GitHub action, highlighting a command injection vulnerability.

Understanding CVE-2023-51664

This CVE pertains to a security issue in the tj-actions/changed-files GitHub action that allows command injection in changed filenames, potentially leading to arbitrary code execution.

What is CVE-2023-51664?

tj-actions/changed-files is a GitHub action used to retrieve files and directories. Prior to version 41.0.0, this action had a vulnerability that allowed attackers to execute malicious commands, posing a risk of leaking sensitive information.

The Impact of CVE-2023-51664

The vulnerability in tj-actions/changed-files could result in arbitrary command execution on the GitHub Runner platform, compromising the security and integrity of affected systems.

Technical Details of CVE-2023-51664

The vulnerability details, affected systems, and the exploitation mechanism are outlined below:

Vulnerability Description

The vulnerability in tj-actions/changed-files prior to version 41.0.0 allows for command injection in changed filenames, enabling malicious actors to run arbitrary commands and potentially access confidential data.

Affected Systems and Versions

The affected system is tj-actions/changed-files GitHub action with versions prior to 41.0.0. Users using versions below this are at risk of exploitation.

Exploitation Mechanism

By injecting malicious commands into changed filenames during the workflow execution, threat actors can exploit the vulnerability to execute unauthorized commands and compromise system security.

Mitigation and Prevention

To safeguard systems from CVE-2023-51664, users should take immediate action and adopt long-term security practices:

Immediate Steps to Take

Upgrade tj-actions/changed-files to version 41.0.0 or higher to patch the vulnerability.
Review and restrict access permissions for workflows to prevent unauthorized injections.

Long-Term Security Practices

Regularly update GitHub actions and associated dependencies to mitigate potential vulnerabilities.
Implement code review processes to identify and address security flaws in workflows.
Monitor GitHub security advisories and apply patches promptly to protect against known vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates to prevent exploitation of known vulnerabilities like the one addressed in CVE-2023-51664.