Intrusion Prevention

MS.Windows.SMB1.Request.DoS

Description

This indicates an attempt to exploit a Denial of Service vulnerability in Microsoft Server Message Block (SMB) Protocol.
The vulnerability is caused by an error that occurs when Microsoft Server Message Block (SMB) Protocol 2.0 software handles a malformed write request. A remote attacker could crash the vulnerable system by sending a crafted SMB2 request.

Affected Products

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 and Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

Impact

System Compromise: Remote attackers can crash vulnerable systems.

Recommended Actions

Refer to the vendor's web site for suggested workaround.
http://www.microsoft.com/technet/security/Bulletin/ms11-048.mspx

CVE References

CVE-2011-1267