CVE-2020-22249 : Exploit Details and Defense Strategies

A Remote Code Execution vulnerability in phplist 3.5.1 allows attackers to upload malicious plugins, leading to code execution.

Understanding CVE-2020-22249

What is CVE-2020-22249?

The vulnerability in phplist 3.5.1 enables remote attackers to execute arbitrary code by uploading malicious plugins with specific file extensions.

The Impact of CVE-2020-22249

The vulnerability allows unauthorized individuals to execute malicious code on the affected system, potentially leading to data breaches, system compromise, and unauthorized access.

Technical Details of CVE-2020-22249

Vulnerability Description

The issue arises from phplist 3.5.1 not verifying file extensions in uploaded plugins. This oversight allows malicious plugins with PHP, phtml, or php7 extensions to be copied to the plugins directory, enabling remote code execution.

Affected Systems and Versions

Product: phplist
Version: 3.5.1

Exploitation Mechanism

Attackers exploit the vulnerability by uploading a plugin containing PHP files with specific extensions. Once uploaded, the malicious code can be executed remotely.

Mitigation and Prevention

Immediate Steps to Take

Disable plugin uploads in phplist to prevent malicious plugins from being uploaded.
Implement file extension checks to ensure only safe plugins are accepted.

Long-Term Security Practices

Regularly update phplist to the latest version to patch known vulnerabilities.
Conduct security audits to identify and address any potential security gaps.

Patching and Updates

Apply patches and updates provided by phplist promptly to mitigate the vulnerability and enhance system security.