MS.Windows.AD.PreAuth.BROWSER.ELECTION.Heap.Overflow

Description

This indicates an attack attempt to exploit a heap overflow vulnerability in Microsoft Windows.
This issue is caused by an error in the vulnerable software when handling a malformed RequestElection Browser Frame. It may allow remote attackers to execute arbitrary code by sending a crafted Browser Election packet.

Affected Products

Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Refer to the vendor's web site for suggested workaround.
http://www.microsoft.com/technet/security/Bulletin/ms11-019.mspx

References