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TITLE:
Microsoft Windows SMB Processing Array Indexing Vulnerability

SECUNIA ADVISORY ID:
SA36623

VERIFY ADVISORY:
http://secunia.com/advisories/36623/

DESCRIPTION:
Laurent Gaffié has discovered a vulnerability in Microsoft Windows,
which can be exploited by malicious people to cause a DoS (Denial of
Service) or potentially compromise a vulnerable system.

The vulnerability is caused due to an array indexing error in the
srv2.sys kernel driver. This can be exploited to dereference
out-of-bounds memory via a specially crafted SMB packet.

Successful exploitation may allow execution of arbitrary code.

The vulnerability is confirmed in a fully patched Windows Vista
Enterprise SP2. Other versions may also be affected.

SOLUTION:
Restrict access to TCP ports 139 and 445.

PROVIDED AND/OR DISCOVERED BY:
Laurent Gaffié

ORIGINAL ADVISORY:
http://g-laurent.blogspot.com/2009/09/windows-vista7-smb20-negotiate-protocol.html

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