CVE-2020-5203 : Security Advisory and Response

In Fat-Free Framework 3.7.1, attackers can achieve arbitrary code execution if developers choose to pass user-controlled input to the framework's Clear method.

Understanding CVE-2020-5203

What is CVE-2020-5203?

Fat-Free Framework 3.7.1 allows attackers to execute arbitrary code by passing user-controlled input to the Clear method.

The Impact of CVE-2020-5203

This vulnerability can lead to arbitrary code execution, posing a severe security risk to systems utilizing the Fat-Free Framework.

Technical Details of CVE-2020-5203

Vulnerability Description

Attackers can exploit the vulnerability in Fat-Free Framework 3.7.1 by manipulating user-controlled input, such as $_REQUEST, $_GET, or $_POST, leading to arbitrary code execution.

Affected Systems and Versions

Product: Fat-Free Framework
Version: 3.7.1

Exploitation Mechanism

The vulnerability arises when developers inadvertently pass user-controlled input to the Clear method, enabling attackers to execute arbitrary code.

Mitigation and Prevention

Immediate Steps to Take

Avoid passing user-controlled input directly to sensitive methods or functions.
Sanitize and validate all user inputs to prevent code injection attacks.

Long-Term Security Practices

Implement input validation mechanisms to filter out malicious input.
Regularly update the Fat-Free Framework to the latest secure version.
Educate developers on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Apply patches and updates provided by the Fat-Free Framework to address this vulnerability.