[FD] Xen VM Escape

Xen XSA-148(http://ift.tt/1Wlm0Q9) is the real VM Escape Vulnerability XSA-148 is public just now and it's a memory management logic vulnerability obviously. The bulletin means that a micious PV DomU could enable PS/RW flag of its PDE to read/write the 2M page. So, if a attacker prepare a page table at the 2M page, he could use the vulnerability to modify the PT. Finally, this vulnerability changes to a arbitrary machine memory read/write vulnerability.

Source: Gmail -> IFTTT-> Blogger