(Pwn2Own) Microsoft Windows UnserializePropertySet Privilege Context Switching Error Local Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the UnserializePropertySet function. The issue results from improper handling of privilege context transitions. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.