Technical Information

Brief overview of the risk:
This security update resolves a privately reported vulnerability in the Remote Desktop Protocol. The vulnerability could allow denial of service if an affected system received a sequence of specially crafted RDP packets. Microsoft has also received reports of limited, targeted attacks attempting to exploit this vulnerability. By default, the Remote Desktop Protocol (RDP) is not enabled on any Windows operating system.
Detailed Information on the risk:

A denial of service vulnerability exists in the way that the Remote Desktop Protocol accesses an object in memory that has been improperly initialized or has been deleted. An attacker who successfully exploited this vulnerability could cause the target system to stop responding and automatically restart.

Further information on this exploit is available at : MS11-065