This is common in the pentesting world. If you can get physical access to a USB port for just a few seconds you can enter the keystrokes to open up a port (or

This is common in the pentesting world. If you can get physical access to a USB port for just a few seconds you can enter the keystrokes to open up a port (or reverse SSH) to the outside world. With only three different procedures (one for Windows, Mac, and Linux) you can own 99% of the computers in the world.