Intrusion Prevention

MS.Windows.CSRSS.HardError.Messages.DoS

Description

This indicates an attack attempt against a memory corruption vulnerability in
the Windows Server Library and the Client Server Run-Time Subsystem (CSRSS).
The vulnerability is caused by a double-free error in "WINSRV.DLL". Calling a MessageBox API with malformed parameters will trigger this error if "MB_SERVICE_NOTIFICATION" flag set. It allows a remote attacker to crash the vulnerable system or execute arbitrary code.

Affected Products

Microsoft Windows XP Tablet PC Edition SP2
Microsoft Windows XP Tablet PC Edition SP1
Microsoft Windows XP Tablet PC Edition
Microsoft Windows XP Professional x64 Edition SP2
Microsoft Windows XP Professional x64 Edition
Microsoft Windows XP Professional SP2
Microsoft Windows XP Professional SP1
Microsoft Windows XP Professional
Microsoft Windows XP Media Center Edition SP2
Microsoft Windows XP Media Center Edition SP1
Microsoft Windows XP Media Center Edition
Microsoft Windows XP Home SP2
Microsoft Windows XP Home SP1
Microsoft Windows XP Home
Microsoft Windows XP Gold 0
Microsoft Windows XP Embedded SP1
Microsoft Windows XP Embedded
Microsoft Windows XP 64-bit Edition Version 2003 SP1
Microsoft Windows XP 64-bit Edition Version 2003
Microsoft Windows XP 64-bit Edition SP1
Microsoft Windows XP 64-bit Edition
Microsoft Windows XP 0
Microsoft Windows Vista x64 Edition 0
Microsoft Windows Vista Ultimate
Microsoft Windows Vista Home Premium
Microsoft Windows Vista Home Basic
Microsoft Windows Vista Enterprise
Microsoft Windows Vista Business
Microsoft Windows Vista 0
Microsoft Windows Server 2003 Web Edition SP2
Microsoft Windows Server 2003 Web Edition SP1 Beta 1
Microsoft Windows Server 2003 Web Edition SP1
Microsoft Windows Server 2003 Web Edition
Microsoft Windows Server 2003 Standard x64 Edition
Microsoft Windows Server 2003 Standard Edition SP2
Microsoft Windows Server 2003 Standard Edition SP1 Beta 1
Microsoft Windows Server 2003 Standard Edition SP1
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Itanium SP2
Microsoft Windows Server 2003 Itanium SP1
Microsoft Windows Server 2003 Itanium 0
Microsoft Windows Server 2003 Enterprise x64 Edition SP2
Microsoft Windows Server 2003 Enterprise x64 Edition
Microsoft Windows Server 2003 Enterprise Edition Itanium SP1 Beta 1
Microsoft Windows Server 2003 Enterprise Edition Itanium SP1
Microsoft Windows Server 2003 Enterprise Edition Itanium 0
Microsoft Windows Server 2003 Enterprise Edition SP1 Beta 1
Microsoft Windows Server 2003 Enterprise Edition SP1
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Datacenter x64 Edition SP2
Microsoft Windows Server 2003 Datacenter x64 Edition
Microsoft Windows Server 2003 Datacenter Edition Itanium SP1 Beta 1
Microsoft Windows Server 2003 Datacenter Edition Itanium SP1
Microsoft Windows Server 2003 Datacenter Edition Itanium 0
Microsoft Windows Server 2003 Datacenter Edition SP1 Beta 1
Microsoft Windows Server 2003 Datacenter Edition SP1
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows 2000 Server SP4
Microsoft Windows 2000 Server SP3
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server
Microsoft Windows 2000 Professional SP4
Microsoft Windows 2000 Professional SP3
Microsoft Windows 2000 Professional SP2
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Datacenter Server SP4
Microsoft Windows 2000 Datacenter Server SP3
Microsoft Windows 2000 Datacenter Server SP2
Microsoft Windows 2000 Datacenter Server SP1
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Advanced Server SP4
Microsoft Windows 2000 Advanced Server SP3
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server

Impact

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

Recommended Actions

Apply patch, available from the web site:
http://www.microsoft.com/technet/security/Bulletin/MS07-021.mspx

CVE References

CVE-2006-6696