Intrusion Prevention

MS.Windows.SChannel.Authentication.Component.Spoofing

Description

This indicates an attack attempt against a security vulnerability in the Microsoft Internet Information Server (IIS).
The vulnerability is caused by an error when the vulnerable software handles specially crafted Client Certificate Mapping. It allows a remote attacker to spoof authentication.

Affected Products

Microsoft Windows 2000 Service Pack 4
Microsoft Windows XP Service Pack 2
Microsoft Windows XP Service Pack 3
Microsoft Windows XP Professional x64 Edition
Microsoft Windows XP Professional x64 Edition Service Pack 2
Microsoft Windows Server 2003 Service Pack 1
Microsoft Windows Server 2003 Service Pack 2
Microsoft Windows Server 2003 x64 Edition
Microsoft Windows Server 2003 x64 Edition Service Pack 2
Microsoft Windows Server 2003 SP1 (Itanium)
Microsoft Windows Server 2003 SP2 (Itanium)
Microsoft Windows Vista
Microsoft Windows Vista Service Pack 1
Microsoft Windows Vista x64 Edition
Microsoft Windows Vista x64 Edition Service Pack 1
Microsoft Windows Server 2008 (32-bit)
Microsoft Windows Server 2008 (x64)
Microsoft Windows Server 2008 (Itanium)

Impact

Information Spoofing: Remote attackers can spoof datas of vulnerable systems

Recommended Actions

Apply the latest update from the vendor:
http://www.microsoft.com/technet/security/Bulletin/MS09-007.mspx

CVE References

CVE-2009-0085