CVE-2019-19373 : Security Advisory and Response

A vulnerability has been found in Squiz Matrix CMS versions 5.5.0 to 5.5.0.3, 5.5.1 to 5.5.1.8, 5.5.2 to 5.5.2.4, and 5.5.3 to 5.5.3.3, allowing for remote code execution.

Understanding CVE-2019-19373

This CVE identifies a security flaw in Squiz Matrix CMS that enables the execution of arbitrary code remotely.

What is CVE-2019-19373?

This vulnerability in Squiz Matrix CMS versions 5.5.0 to 5.5.3.3 allows malicious users to trigger the unserialization of a PHP object through a specific POST parameter, leading to remote code execution.

The Impact of CVE-2019-19373

Exploiting this vulnerability can result in the inclusion of arbitrary files on the filesystem, known as local file inclusion, which can lead to remote code execution.

Technical Details of CVE-2019-19373

This section provides more technical insights into the vulnerability.

Vulnerability Description

The flaw in Squiz Matrix CMS versions 5.5.0 to 5.5.3.3 allows a user to initiate the unserialization of a PHP object through a POST parameter, enabling remote code execution.

Affected Systems and Versions

Squiz Matrix CMS 5.5.0 to 5.5.0.3
Squiz Matrix CMS 5.5.1 to 5.5.1.8
Squiz Matrix CMS 5.5.2 to 5.5.2.4
Squiz Matrix CMS 5.5.3 to 5.5.3.3

Exploitation Mechanism

The vulnerability is exploited by triggering the unserialization of a PHP object from a specific POST parameter during the processing of a Remote Content page, allowing for the inclusion of arbitrary files on the filesystem and subsequent remote code execution.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply the latest security patches provided by Squiz Matrix CMS.
Monitor for any unusual activities on the system.
Restrict access to the vulnerable POST parameter.

Long-Term Security Practices

Regularly update and patch the CMS and its components.
Conduct security audits and penetration testing to identify vulnerabilities.
Educate users on secure coding practices and potential threats.

Patching and Updates

Ensure that the Squiz Matrix CMS is updated to versions that address this vulnerability to prevent exploitation.