CVE-2021-39459 : Exploit Details and Defense Strategies

This CVE-2021-39459 article provides details about a remote code execution vulnerability in the Yakamara Media Redaxo CMS version 5.12.1.

Understanding CVE-2021-39459

This section will cover the impact, technical details, and mitigation steps related to CVE-2021-39459.

What is CVE-2021-39459?

CVE-2021-39459 refers to a remote code execution vulnerability in the modules component of Yakamara Media Redaxo CMS version 5.12.1. An authenticated CMS user can exploit this issue to execute code on the hosting system using a module containing malicious PHP code.

The Impact of CVE-2021-39459

This vulnerability allows an authenticated attacker to execute arbitrary code on the hosting system, leading to potential compromise of sensitive data, unauthorized access, and complete system takeover.

Technical Details of CVE-2021-39459

Let's delve into the technical aspects of this vulnerability.

Vulnerability Description

The vulnerability in the modules component of Yakamara Media Redaxo CMS version 5.12.1 enables an authenticated CMS user to execute arbitrary code through a module containing malicious PHP code.

Affected Systems and Versions

Product: Yakamara Media Redaxo CMS
Version: 5.12.1

Exploitation Mechanism

The exploitation involves an authenticated CMS user uploading a module with malicious PHP code to trigger remote code execution on the hosting system.

Mitigation and Prevention

Protect your systems by following these mitigation strategies.

Immediate Steps to Take

Upgrade Yakamara Media Redaxo CMS to a patched version that addresses the vulnerability.
Restrict access to the CMS to authorized users only.
Monitor and review modules before installation for potentially malicious code.

Long-Term Security Practices

Implement regular security training for CMS users on identifying and avoiding malicious code.
Keep systems and software up to date to prevent known vulnerabilities.
Conduct regular security audits and penetration testing to identify and remediate potential risks.

Patching and Updates

Apply security patches and updates provided by Yakamara Media Redaxo CMS to ensure the latest fixes for vulnerabilities like CVE-2021-39459.