Microsoft SMB Transaction Parsing Remote Code Execution Vulnerability

Summary
This host is missing a critical security update according to Microsoft Bulletin MS11-020.
Impact
Successful exploitation could allow remote attackers to execute arbitrary code on the system. Impact Level: System
Solution
Run Windows Update and update the listed hotfixes or download and update mentioned hotfixes in the advisory from the below link, http://technet.microsoft.com/en-us/security/bulletin/MS11-020
Insight
The flaw is due to improper validation of field in SMB request, which allows remote attackers to execute arbitrary code on the system by sending a malformed SMB request.
Affected
Microsoft Windows 7 SP1 and prior Microsoft Windows 2008 SP2 and prior Microsoft Windows Vista SP2 and prior Microsoft Windows 2008 R2 SP1 and prior Microsoft Windows XP Service Pack 3 and prior Microsoft Windows 2003 Service Pack 2 and prior
References