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Vigil@nce - Windows: privilege elevation via AFD

July 2014 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.

Impacted products: Windows 2003, Windows 2008, Microsoft Windows
2012, Windows 7, Windows 8, Windows RT, Windows Vista

Severity: 2/4

Creation date: 08/07/2014

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.

However, TDI does not correctly check User Mode parameters given
to the kernel. Technical details are unknown.

A local attacker can therefore create an error in Ancillary
Function Driver in order to execute code with system privileges.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Windows-privilege-elevation-via-AFD-15009


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