As reported on in several recent articles, security consultant Adam Boileau has found a relatively simple way to exploit FireWire ports to hack into Windows machines.

I'm not going to lie awake at night worrying about FireWire hacks, but this news should serve as a reminder that the more interfaces you stick on a computer, the harder it becomes to control what happens to that computer. The more network services you have, the more remotely accessible things that can break. The more hardware interfaces, and the higher the level of service they provide, the more likely it is that a physical attack can be conducted without the use of the keyboard.
Complex things break in unforeseen ways.