CVE-2019-5736 Explained : Impact and Mitigation

A security vulnerability in runc version 1.0-rc6 used in Docker before 18.09.2 allows attackers to gain full root access to the host system by replacing the host runc binary file.

Understanding CVE-2019-5736

This CVE involves a critical security flaw in runc, impacting Docker and similar products, enabling unauthorized access to the host system.

What is CVE-2019-5736?

The vulnerability in runc version 1.0-rc6 allows attackers to replace the host runc binary file, leading to complete root access to the host system.

The Impact of CVE-2019-5736

The exploitation of this vulnerability grants attackers full control over the host system, posing significant security risks.

Technical Details of CVE-2019-5736

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The security flaw in runc version 1.0-rc6 allows attackers to overwrite the host runc binary, resulting in unauthorized root access.

Affected Systems and Versions

runc version 1.0-rc6
Docker versions before 18.09.2

Exploitation Mechanism

The vulnerability is exploited by executing a command as root within specific container types, enabling attackers to gain root access to the host system.

Mitigation and Prevention

Protecting systems from CVE-2019-5736 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update runc and Docker to patched versions
Monitor for any unauthorized access or suspicious activities
Implement container security best practices

Long-Term Security Practices

Regularly update container runtimes and related software
Conduct security audits and vulnerability assessments
Educate users on secure container usage

Patching and Updates

Apply patches provided by runc and Docker to address the vulnerability
Stay informed about security advisories and updates from relevant vendors