CVE-2019-7743 : Security Advisory and Response

A vulnerability has been identified in Joomla! versions prior to 3.9.3 involving the exploitation of objection injection attacks through the phar:// stream wrapper.

Understanding CVE-2019-7743

This CVE-2019-7743 vulnerability allows the phar:// handler to be used for non .phar-files, enabling attacks due to the absence of a protective mechanism.

What is CVE-2019-7743?

This vulnerability in Joomla! versions before 3.9.3 permits objection injection attacks through the phar:// stream wrapper, lacking a protective mechanism like the TYPO3 PHAR stream wrapper.

The Impact of CVE-2019-7743

The absence of protection mechanisms allows malicious actors to exploit the phar:// handler for non .phar-files, potentially leading to unauthorized access and data manipulation.

Technical Details of CVE-2019-7743

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

An issue in Joomla! before 3.9.3 enables objection injection attacks using the phar:// stream wrapper due to the absence of protective measures.

Affected Systems and Versions

Affected Version: Joomla! versions prior to 3.9.3

Exploitation Mechanism

Attackers can utilize the phar:// handler for non .phar-files to execute objection injection attacks.

Mitigation and Prevention

Protective measures and steps to mitigate the CVE-2019-7743 vulnerability.

Immediate Steps to Take

Update Joomla! to version 3.9.3 or later to patch the vulnerability.
Monitor for any unauthorized access or suspicious activities.

Long-Term Security Practices

Regularly update Joomla! and all its components to the latest versions.
Implement security best practices to prevent similar exploitation in the future.

Patching and Updates

Apply security patches promptly to ensure protection against known vulnerabilities.