Unraid webGui remote code execution

Added: 04/30/2020
CVE: CVE-2020-5847

Background

Unraid is a network-attached storage operating system. It runs a web-based graphical user interface (webGui) written in PHP.

Problem

The Unraid webGui uses the PHP **extract** function to load all GET parameters into the application as variables, allowing a remote user to control any program variable, leading to command execution.

Resolution

Upgrade to Unraid 6.8.1 or higher.

References

<https://sysdream.com/news/lab/2020-02-06-cve-2020-5847-cve-2020-5849-unraid-6-8-0-unauthenticated-remote-code-execution-as-root/&gt;