CVE-2021-23128 : Security Advisory and Response

A detailed overview of CVE-2021-23128 focusing on Joomla! CMS vulnerability related to Insecure Randomness in the FOFEncryptRandval implementation.

Understanding CVE-2021-23128

This section delves into the impact and technical aspects of the CVE-2021-23128 vulnerability in Joomla! CMS.

What is CVE-2021-23128?

CVE-2021-23128 is an issue discovered in Joomla! versions 3.2.0 through 3.9.24, specifically related to the potential insecure FOFEncryptRandval implementation within the core.

The Impact of CVE-2021-23128

The vulnerability allowed for potentially insecure randomness due to the flawed randval implementation. However, the issue has been addressed by replacing it with a more secure method.

Technical Details of CVE-2021-23128

Explore the specific technical details regarding the vulnerability in Joomla! CMS.

Vulnerability Description

The core shipped but unused randval implementation within FOF (FOFEncryptRandval) posed a risk of insecure randomness, which has been fixed by transitioning to 'random_bytes()'.

Affected Systems and Versions

Joomla! CMS versions 3.2.0 through 3.9.24 were impacted by this vulnerability.

Exploitation Mechanism

Attackers could potentially exploit the insecure randomness to compromise the security of Joomla! websites.

Mitigation and Prevention

Learn about the steps to mitigate and prevent exploitation of CVE-2021-23128 in Joomla! CMS.

Immediate Steps to Take

Ensure that your Joomla! CMS is updated to the latest version that includes the fix for the insecure randomness issue.

Long-Term Security Practices

Implement secure coding practices and regular security audits to prevent similar vulnerabilities in the future.

Patching and Updates

Frequently check for updates from Joomla! Project and apply patches promptly to safeguard your website from security risks.