Signature Detail

HTTP: Microsoft Compiled Help (.chm) File Download

This signature detects an attempt to download a Microsoft Compiled Help (.chm) file. Opening a malicious .chm file can allow for arbitrary code execution, leading to system comprimise. This vulnerability is present in Microsoft Windows 2000 and Microsoft Windows XP. Please note that there are legitimate uses for this filetype. Therefore, not all instances of this signature are actual attacks.

Extended Description

The Microsoft Windows HTML Help facility is prone to a remotely exploitable heap overflow vulnerability. This vulnerability could be exploited from a malicious Web page or through HTML email to execute arbitrary code with the privileges of the currently logged in user.

Affected Products

• Avaya DefinityOne Media Servers
• Avaya IP600 Media Servers
• Avaya S3400 Message Application Server
• Avaya S8100 Media Servers
• Microsoft Windows 2000 Advanced Server SP1
• Microsoft Windows 2000 Advanced Server SP2
• Microsoft Windows 2000 Advanced Server SP3
• Microsoft Windows 2000 Advanced Server SP4
• Microsoft Windows 2000 Advanced Server
• Microsoft Windows 2000 Datacenter Server SP1
• Microsoft Windows 2000 Datacenter Server SP2
• Microsoft Windows 2000 Datacenter Server SP3
• Microsoft Windows 2000 Datacenter Server SP4
• Microsoft Windows 2000 Datacenter Server
• Microsoft Windows 2000 Professional SP1
• Microsoft Windows 2000 Professional SP2
• Microsoft Windows 2000 Professional SP3
• Microsoft Windows 2000 Professional SP4
• Microsoft Windows 2000 Professional
• Microsoft Windows 2000 Server SP1
• Microsoft Windows 2000 Server SP2
• Microsoft Windows 2000 Server SP3
• Microsoft Windows 2000 Server SP4
• Microsoft Windows 2000 Server
• Microsoft Windows 98
• Microsoft Windows 98SE
• Microsoft Windows ME
• Microsoft Windows NT Enterprise Server 4.0
• Microsoft Windows NT Enterprise Server 4.0 SP1
• Microsoft Windows NT Enterprise Server 4.0 SP2
• Microsoft Windows NT Enterprise Server 4.0 SP3
• Microsoft Windows NT Enterprise Server 4.0 SP4
• Microsoft Windows NT Enterprise Server 4.0 SP5
• Microsoft Windows NT Enterprise Server 4.0 SP6
• Microsoft Windows NT Enterprise Server 4.0 SP6a
• Microsoft Windows NT Server 4.0
• Microsoft Windows NT Server 4.0 SP1
• Microsoft Windows NT Server 4.0 SP2
• Microsoft Windows NT Server 4.0 SP3
• Microsoft Windows NT Server 4.0 SP4
• Microsoft Windows NT Server 4.0 SP5
• Microsoft Windows NT Server 4.0 SP6
• Microsoft Windows NT Server 4.0 SP6a
• Microsoft Windows NT Terminal Server 4.0
• Microsoft Windows NT Terminal Server 4.0 SP1
• Microsoft Windows NT Terminal Server 4.0 SP2
• Microsoft Windows NT Terminal Server 4.0 SP3
• Microsoft Windows NT Terminal Server 4.0 SP4
• Microsoft Windows NT Terminal Server 4.0 SP5
• Microsoft Windows NT Terminal Server 4.0 SP6
• Microsoft Windows NT Workstation 4.0
• Microsoft Windows NT Workstation 4.0 SP1
• Microsoft Windows NT Workstation 4.0 SP2
• Microsoft Windows NT Workstation 4.0 SP3
• Microsoft Windows NT Workstation 4.0 SP4
• Microsoft Windows NT Workstation 4.0 SP5
• Microsoft Windows NT Workstation 4.0 SP6
• Microsoft Windows NT Workstation 4.0 SP6a
• Microsoft Windows Server 2003 Datacenter Edition
• Microsoft Windows Server 2003 Datacenter Edition Itanium
• Microsoft Windows Server 2003 Enterprise Edition
• Microsoft Windows Server 2003 Enterprise Edition Itanium
• Microsoft Windows Server 2003 Standard Edition
• Microsoft Windows Server 2003 Web Edition
• Microsoft Windows XP 64-bit Edition SP1
• Microsoft Windows XP 64-bit Edition
• Microsoft Windows XP 64-bit Edition Version 2003 SP1
• Microsoft Windows XP 64-bit Edition Version 2003
• Microsoft Windows XP Home SP1
• Microsoft Windows XP Home
• Microsoft Windows XP Professional SP1
• Microsoft Windows XP Professional

References

• BugTraq: 10705
• CVE: CVE-2004-0201
• URL: http://www.microsoft.com/technet/security/bulletin/MS04-023.mspx
• URL: http://support.microsoft.com/?kbid=291369