CVE-2019-19141 Explained : Impact and Mitigation

Plex Media Server through version 1.18.2.2029 allows authenticated remote users to write files in any accessible location, potentially leading to remote code execution.

Understanding CVE-2019-19141

What is CVE-2019-19141?

The vulnerability in Plex Media Server's Camera Upload feature permits remote users to write files in locations accessible by the server's user account, posing a risk of remote code execution.

The Impact of CVE-2019-19141

The vulnerability could be exploited by attackers to execute remote code on the server, compromising its security and potentially gaining unauthorized access.

Technical Details of CVE-2019-19141

Vulnerability Description

The Camera Upload feature in Plex Media Server allows authenticated remote users to write files in any location accessible by the server's user account, creating a potential avenue for remote code execution.

Affected Systems and Versions

Plex Media Server through version 1.18.2.2029

Exploitation Mechanism

Attackers can leverage directory traversal to create a .ssh folder in the Plex user's home directory on a default Ubuntu installation, upload an SSH authorized_keys file, and access the host as the Plex user via SSH.

Mitigation and Prevention

Immediate Steps to Take

Disable the Camera Upload feature if not essential
Regularly monitor and review file permissions and user access

Long-Term Security Practices

Implement strong authentication mechanisms
Conduct regular security audits and penetration testing

Patching and Updates

Apply patches and updates provided by Plex Media Server to address the vulnerability