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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.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/W...




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