(0Day) (Pwn2Own\Pwn4Fun) Microsoft Internet Explorer localhost Protected Mode Bypass Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the ability to trick the broker into loading a malicious page in a privileged context. The issue lies in the implicit trust of navigating to localhost. An attacker can leverage this vulnerability along with proxy shellcode to execute code under the context of the current user at medium integrity.