I while ago I wrote about the “Token Kidnapping” vulnerability in Windows. By looking at the slides and POC it becomes clear that there is no easy fix for that.
According to Microsoft, the problem is fixed now – and indeed – it seemed to be a huge effort:
“Addressing this issue required one of the most epic engineering efforts we have ever expended for a Microsoft security update. This security update changed parts of the Windows kernel; the COM, DCOM, and LSASS subsystems; the WMI and MSDTC built-in services; and the service control manager (SCM).”
The details are described here. Thanks for the information, MSRC!