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Vigil@nce - Windows: privilege elevation via TCP/IP
August 2010 by Vigil@nce
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.
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