A vulnerability has been discovered in the Xbox 360 hypervisor that allows privilege escalation into hypervisor mode. Together with a method to inject data into non-privileged memory areas, this vulnerability allows an attacker with physical access to an Xbox 360 to run arbitrary code such as alternative operating systems with full privileges and full hardware access.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/54809/xbox-pwn.txt
Source: https://packetstormsecurity.com/files/54809/xbox-pwn.txt.html