Technical Information

Brief overview of the risk:
The vulnerabilities could allow denial of service if an attacker sends a sequence of specially crafted Internet Control Message Protocol (ICMP) messages to a target system or sends a specially crafted URL request to a server that is serving Web content and has the URL-based Quality of Service (QoS) feature enabled.
Detailed Information on the risk:

A denial of service vulnerability exists in the Windows TCP/IP stack that is caused when the TCP/IP stack improperly handles URLs in memory when URL-based Quality of Service (QoS) is enabled. 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 : MS11-064