Microsoft Windows XP Fast User Switching Process Viewing Weakness

Microsoft Windows XP Fast User Switching Process Viewing Weakness

Microsoft Windows XP contains a feature called Fast User Switching (FUS). This allows multiple users to be concurrently logged onto the system; only one user can interact with the system at a time.

There is a weakness in FUS that could allow a user that was previously a member of the Administrators group to still view other users' processes. If the user enabled the ability to view other users' processes while they were a member of the Administrators group, they will still be able to do this after they are removed from the Administrators group.