CVE-2021-28379 : Exploit Details and Defense Strategies

A detailed article outlining the CVE-2021-28379 vulnerability in Vesta Control Panel and myVesta, including its impact, technical details, and mitigation strategies.

Understanding CVE-2021-28379

This section provides insights into the security vulnerability identified as CVE-2021-28379 in Vesta Control Panel and myVesta.

What is CVE-2021-28379?

The CVE-2021-28379 vulnerability exists in web/upload/UploadHandler.php in Vesta Control Panel (VestaCP) through version 0.9.8-27 and myVesta through version 0.9.8-26-39. It allows uploads from a different origin, posing a security risk.

The Impact of CVE-2021-28379

The vulnerability can be exploited to allow uploads from unauthorized or malicious sources, potentially leading to unauthorized access, data breaches, and other security compromises.

Technical Details of CVE-2021-28379

This section delves into the technical aspects of the CVE-2021-28379 vulnerability, including its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in Vesta Control Panel and myVesta enables an attacker to upload files from an external or unauthorized source, bypassing security mechanisms and potentially compromising the integrity of the system.

Affected Systems and Versions

Vesta Control Panel up to version 0.9.8-27 and myVesta up to version 0.9.8-26-39 are confirmed to be affected by this vulnerability.

Exploitation Mechanism

By leveraging the flaw in the UploadHandler.php component, threat actors can upload files from untrusted origins, opening doors to various cyber attacks.

Mitigation and Prevention

This section provides guidance on immediate steps to mitigate the CVE-2021-28379 vulnerability and secure systems in the long term.

Immediate Steps to Take

Administrators should restrict file uploads to trusted sources, apply security patches promptly, and monitor system logs for any suspicious activity to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and educating users on safe upload practices can help prevent similar vulnerabilities in the future.

Patching and Updates

Users are advised to update Vesta Control Panel and myVesta to the latest versions that address the CVE-2021-28379 vulnerability and follow security best practices.