The hack is performed using a modified save-game for "007: Agent Under Fire." The modified save-game causes a buffer overflow and that in turn starts a compact version of Linux.
This was the major hurdle in getting an Xbox to run a full version of Linux, the machines are designed to only run code digitally signed by Microsoft. The fact that this major obstacle has been crossed will almost certainly lead to far more exploits.
A full version of Linux running on an unmodified Xbox would be a nightmare for Microsoft. It sells the machines at a loss so any Xbox running Linux is costing the company money. µ
Being in a minority of one doesn't make you right
WeWork needs a rework
Because who wants any surprises
Viv-oh no they didn't