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TITLE:
Microsoft Windows Ancillary Function Driver Privilege Escalation

SECUNIA ADVISORY ID:
SA32261

VERIFY ADVISORY:
http://secunia.com/advisories/32261/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

OPERATING SYSTEM:
Microsoft Windows XP Home Edition
http://secunia.com/advisories/product/16/
Microsoft Windows XP Professional
http://secunia.com/advisories/product/22/
Microsoft Windows Server 2003 Datacenter Edition
http://secunia.com/advisories/product/1175/
Microsoft Windows Server 2003 Enterprise Edition
http://secunia.com/advisories/product/1174/
Microsoft Windows Server 2003 Standard Edition
http://secunia.com/advisories/product/1173/
Microsoft Windows Server 2003 Web Edition
http://secunia.com/advisories/product/1176/
Microsoft Windows Storage Server 2003
http://secunia.com/advisories/product/12399/

DESCRIPTION:
A vulnerability has been reported in Microsoft Windows, which can be
exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to an input validation error in the
Ancillary Function Driver (afd.sys) and can be exploited to execute
arbitrary code in kernel mode.

SOLUTION:
Apply patches.

Windows XP SP2/SP3:
http://www.microsoft.com/downloads/details.aspx?familyid=b16d9dac-c430-4dd8-a1e5-9a614801f1d9

Windows XP Professional x64 Edition (optionally with SP2):
http://www.microsoft.com/downloads/details.aspx?familyid=5b607efc-c6fb-4079-8478-e4f3262386d3

Windows Server 2003 SP1/SP2:
http://www.microsoft.com/downloads/details.aspx?familyid=ee88ff2d-1b12-4f4c-a081-9f27a6fba074

Windows Server 2003 x64 Edition (optionally with SP2):
http://www.microsoft.com/downloads/details.aspx?familyid=ab4d94d3-458c-4946-ab7f-03a279629d25

Windows Server 2003 with SP1/SP2 for Itanium-based systems:
http://www.microsoft.com/downloads/details.aspx?familyid=63234f85-6e5d-4ef6-b7cf-d1d2c78a5517

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Fabien Le Mentec, SkyRecon.

ORIGINAL ADVISORY:
MS08-066 (KB956803):
http://www.microsoft.com/technet/security/Bulletin/MS08-066.mspx

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