Microsoft Windows Installer Service Time-Of-Check Time-Of-Use 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 host system in order to exploit this vulnerability. The specific flaw exists within the Windows Installer service. By creating a junction, an attacker can abuse the service to change permissions on an arbitrary file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.