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Vigil@nce - Windows: privilege elevation via AFD
March 2012 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
A local attacker can create an error in Ancillary Function Driver in order to execute code with system privileges.
Severity: 2/4
Creation date: 15/02/2012
IMPACTED PRODUCTS
Microsoft Windows 2003
Microsoft Windows 2008
Microsoft Windows 7
Microsoft Windows Vista
Microsoft Windows XP
DESCRIPTION OF THE VULNERABILITY
The afd.sys (Ancillary Function Driver) driver is used to access to Winsock network features. The TDI (Transport Driver Interface) interface is used to communicate with AFD. It is impacted by two vulnerabilities on 64 bit computers.
TDI does not correctly check User Mode parameters given to the kernel, which corrupts the memory. [severity:2/4; BID-51930, CVE-2012-0148]
TDI does not correctly check User Mode parameters given to the kernel, which corrupts the memory. [severity:2/4; BID-51936, CVE-2012-0149]
A local attacker can therefore create an error in Ancillary Function Driver in order to execute code with system privileges.
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