CVE-2021-20123 : Security Advisory and Response

A local file inclusion vulnerability has been discovered in Draytek VigorConnect 1.6.0-B3, specifically in the file download functionality of the DownloadFileServlet endpoint. This vulnerability could allow an unauthenticated attacker to download arbitrary files from the underlying operating system with root privileges.

Understanding CVE-2021-20123

This section will provide insights into the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-20123?

The CVE-2021-20123 vulnerability is classified as a Path Traversal flaw that exists in Draytek VigorConnect 1.6.0-B3, enabling unauthorized file downloads.

The Impact of CVE-2021-20123

The vulnerability poses a severe security risk as malicious actors could exploit it to access sensitive files on the system with elevated privileges.

Technical Details of CVE-2021-20123

Let's delve deeper into the specifics of this vulnerability.

Vulnerability Description

The flaw resides in the file download feature of the DownloadFileServlet endpoint, allowing unauthenticated attackers to retrieve files from the OS.

Affected Systems and Versions

Draytek VigorConnect version 1.6.0-B3 is confirmed to be impacted by this vulnerability.

Exploitation Mechanism

By leveraging the local file inclusion vulnerability, threat actors can perform unauthorized downloads from the system with root-level access.

Mitigation and Prevention

Discover how to protect your system from potential exploitation and ensure its security.

Immediate Steps to Take

In response to CVE-2021-20123, users should take immediate actions to secure their systems. This will involve...

Long-Term Security Practices

Implementing robust security measures and best practices can help mitigate such vulnerabilities in the future.

Patching and Updates

Regularly updating Draytek VigorConnect to the latest version and applying security patches is crucial in preventing exploitation of this vulnerability.