Vulnerability in Windows Kernel Could Allow Elevation of Privilege (943078)

Summary
This host is missing a critical security update according to Microsoft Bulletin MS07-066.
Impact
Successful exploitation allows remote attackers to execute arbitrary code with kernel privileges. Impact Level: System/Application
Solution
Run Windows Update and update the listed hotfixes or download and update mentioned hotfixes in the advisory from the below link, http://www.microsoft.com/technet/security/bulletin/ms07-066.mspx
Insight
The flaw is due to an unspecified error in the way the Windows Advanced Local Procedure Call (ALPC) validates certain conditions of legacy reply paths.
Affected
Microsoft Windows Vista.
References