Microsoft Windows NtUserResolveDesktopForWOW Heap-based Buffer Overflow Privilege Escalation Vulnerability

2020-02-20T00:00:00
ID ZDI-20-259
Type zdi
Reporter anch0vy@theori, kkokkokye@theori
Modified 2020-06-22T00:00:00

Description

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 function NtUserResolveDesktopForWOW. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of SYSTEM.