(0Day) (Pwn2Own) Microsoft Internet Explorer PresentationHost.exe 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 handling of entries within the ElevationPolicy. The issue lies in the ability to call PresentationHost.exe to load a page outside of the sandbox. An attacker can leverage this vulnerability to execute code in the context of the current user at medium integrity.