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This bulletin was written by Vigil@nce : http://vigilance.fr/

SYNTHESIS OF THE VULNERABILITY

A local attacker can use a vulnerability of the Windows
implementation of TCP/IP, in order to elevate his privileges.

Severity: 2/4

Creation date: 11/08/2010

DESCRIPTION OF THE VULNERABILITY

Sockets of the Windows TCP/IP stack can be controlled via the
WSAIoctl() function.

The SIO_ADDRESS_LIST_SORT ioctl sort addresses, by calling the
IppSortDestinationAddresses() function. However, if a parameter of
IppSortDestinationAddresses is too high, an integer overflow
occurs and leads to a memory corruption.

A local attacker can therefore use the SIO_ADDRESS_LIST_SORT
ioctl, in order to elevate his privileges.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Windows-privilege-elevation-via-TCP-IP-9834