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Microsoft Windows HTML Help Remote Code Execution Vulnerability

Risk
High

Date Discovered
06-14-2005

Description
Microsoft Windows HTML Help is affected by a remote code execution vulnerability.

The vulnerability presents itself when the application handles malformed data through the InfoTech protocol (ms-its, its, mk:@msitstore).

An attacker may exploit this issue from a malicious Web page or through HTML email to execute arbitrary code with the privileges of the currently logged in user.

Symantec Vulnerability Assessment
Symantec Vulnerability Assessment detects and reports this vulnerability. Click here for the advisory released June 15, 2005.

Symantec Enterprise Security Manager
Symantec Enterprise Security Manager™ posted an update to the OS Patch Policy that detects and reports systems that are not patched against this vulnerability. Click here for the advisory released June 16, 2005.

Symantec Enterprise Security Manager Network Assessment Module
Symantec Enterprise Security Manager Network Assessment Module detects and reports this vulnerability. Click here for the advisory released August 9, 2005.

Platforms Affected
Avaya DefinityOne Media Servers
Avaya IP600 Media Servers
Avaya S3400 Message Application Server
Avaya S8100 Media Servers

Components Affected
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
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 Professional SP4
Microsoft Windows 2000 Professional SP3
Microsoft Windows 2000 Professional SP2
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional
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 98
Microsoft Windows 98SE
Microsoft Windows ME
Microsoft Windows Server 2003 Datacenter Edition SP1
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows Server 2003 Datacenter Edition 64-bit SP1
Microsoft Windows Server 2003 Datacenter Edition 64-bit
Microsoft Windows Server 2003 Datacenter x64 Edition
Microsoft Windows Server 2003 Enterprise Edition SP1
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Enterprise Edition 64-bit SP1
Microsoft Windows Server 2003 Enterprise Edition 64-bit
Microsoft Windows Server 2003 Enterprise x64 Edition
Microsoft Windows Server 2003 Standard Edition SP1
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Standard x64 Edition
Microsoft Windows Server 2003 Web Edition SP1
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 SP2
Microsoft Windows XP Home SP1
Microsoft Windows XP Home
Microsoft Windows XP Media Center Edition SP2
Microsoft Windows XP Media Center Edition SP1
Microsoft Windows XP Media Center Edition
Microsoft Windows XP Professional SP2
Microsoft Windows XP Professional SP1
Microsoft Windows XP Professional
Microsoft Windows XP Professional x64 Edition
Microsoft Windows XP Tablet PC Edition SP2
Microsoft Windows XP Tablet PC Edition SP1
Microsoft Windows XP Tablet PC Edition

Recommendations
Do not follow links provided by unknown or untrusted sources.
Users should be wary of following links provided by untrusted or unfamiliar sources, especially if they arrive unsolicited in email. This may reduce exposure to various attacks that depend on the victim following a malicious link.

Do not accept communications that originate from unknown or untrusted sources.
Users should not accept or open HTML email as it may provide a means of exploiting numerous vulnerabilities. Support for HTML email may be disabled in the email client. HTML email may also be filtered at the gateway.

Run all software as a non-privileged user with minimal access rights.
All non-administrative tasks, such as browsing the Web and reading email, should be performed as an unprivileged user with minimal access rights. This will limit the consequences of latent vulnerabilities.

Microsoft has released patches to address this issue for all supported platforms. Microsoft plans to release updates for Windows 98, Windows 98 Second Edition, and Windows Millennium Edition in the near future.

Localized fixes for Microsoft Windows Millennium Edition (Slovenian, Slovakian, and Thai) are available as well.


Microsoft Windows 2000 Advanced Server SP4:

Microsoft Upgrade Security Update for Windows 2000 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=9AF346AE-4807-42F4-95E2-8F5FAE321102&displaylang=en

Microsoft Windows 2000 Advanced Server SP3:
Microsoft Upgrade Security Update for Windows 2000 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=9AF346AE-4807-42F4-95E2-8F5FAE321102&displaylang=en

Microsoft Windows 2000 Advanced Server SP2:
Microsoft Windows 2000 Advanced Server SP1:
Microsoft Windows 2000 Advanced Server :
Microsoft Windows 2000 Datacenter Server SP4:
Microsoft Upgrade Security Update for Windows 2000 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=9AF346AE-4807-42F4-95E2-8F5FAE321102&displaylang=en

Microsoft Windows 2000 Datacenter Server SP3:
Microsoft Upgrade Security Update for Windows 2000 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=9AF346AE-4807-42F4-95E2-8F5FAE321102&displaylang=en

Microsoft Windows 2000 Datacenter Server SP2:
Microsoft Windows 2000 Datacenter Server SP1:
Microsoft Windows 2000 Datacenter Server :
Microsoft Windows 2000 Professional SP4:
Microsoft Upgrade Security Update for Windows 2000 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=9AF346AE-4807-42F4-95E2-8F5FAE321102&displaylang=en

Microsoft Windows 2000 Professional SP3:
Microsoft Upgrade Security Update for Windows 2000 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=9AF346AE-4807-42F4-95E2-8F5FAE321102&displaylang=en

Microsoft Windows 2000 Professional SP2:
Microsoft Windows 2000 Professional SP1:
Microsoft Windows 2000 Professional :
Microsoft Windows 2000 Server SP4:
Microsoft Upgrade Security Update for Windows 2000 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=9AF346AE-4807-42F4-95E2-8F5FAE321102&displaylang=en

Microsoft Windows 2000 Server SP3:
Microsoft Upgrade Security Update for Windows 2000 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=9AF346AE-4807-42F4-95E2-8F5FAE321102&displaylang=en

Microsoft Windows 2000 Server SP2:
Microsoft Windows 2000 Server SP1:
Microsoft Windows 2000 Server :
Microsoft Windows 98 :
Microsoft Windows 98SE :
Microsoft Windows ME :
Microsoft Upgrade WindowsME-KB896358-SLV.EXE
http://download.microsoft.com/download/0/3/E/03E845F6-7F6E-49A6-8DDA-C0338E80E517/WindowsME-KB896358-SLV.EXE
Microsoft Upgrade WindowsME-KB896358-SKY.EXE
http://download.microsoft.com/download/0/3/E/03E845F6-7F6E-49A6-8DDA-C0338E80E517/WindowsME-KB896358-SKY.EXE
Microsoft Upgrade WindowsME-KB896358-THA.EXE
http://download.microsoft.com/download/0/3/E/03E845F6-7F6E-49A6-8DDA-C0338E80E517/WindowsME-KB896358-THA.EXE

Microsoft Windows Server 2003 Datacenter Edition SP1:
Microsoft Upgrade Security Update for Windows Server 2003 (KB896358) - English
http://www.microsoft.com/downloads/details.aspx?familyid=A19EEE21-7DF2-4B95-A4C5-44C6CAA5AF9A&displaylang=en

Microsoft Windows Server 2003 Datacenter Edition :
Microsoft Upgrade Security Update for Windows Server 2003 (KB896358) - English
http://www.microsoft.com/downloads/details.aspx?familyid=A19EEE21-7DF2-4B95-A4C5-44C6CAA5AF9A&displaylang=en

Microsoft Windows Server 2003 Datacenter Edition 64-bit SP1:
Microsoft Upgrade Security Update for Windows Server 2003 64-bit Itanium Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=EE8BA26D-CFDA-428F-9F9B-16908DB88C80&displaylang=en

Microsoft Windows Server 2003 Datacenter Edition 64-bit :
Microsoft Upgrade Security Update for Windows Server 2003 64-bit Itanium Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=EE8BA26D-CFDA-428F-9F9B-16908DB88C80&displaylang=en

Microsoft Windows Server 2003 Datacenter x64 Edition :
Microsoft Upgrade Security Update for Windows Server 2003 x64 Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=2E8716F7-3A81-4482-8C92-2A2DC3C2F782&displaylang=en

Microsoft Windows Server 2003 Enterprise Edition SP1:
Microsoft Upgrade Security Update for Windows Server 2003 (KB896358) - English
http://www.microsoft.com/downloads/details.aspx?familyid=A19EEE21-7DF2-4B95-A4C5-44C6CAA5AF9A&displaylang=en

Microsoft Windows Server 2003 Enterprise Edition :
Microsoft Upgrade Security Update for Windows Server 2003 (KB896358) - English
http://www.microsoft.com/downloads/details.aspx?familyid=A19EEE21-7DF2-4B95-A4C5-44C6CAA5AF9A&displaylang=en

Microsoft Windows Server 2003 Enterprise Edition 64-bit SP1:
Microsoft Upgrade Security Update for Windows Server 2003 64-bit Itanium Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=EE8BA26D-CFDA-428F-9F9B-16908DB88C80&displaylang=en

Microsoft Windows Server 2003 Enterprise Edition 64-bit :
Microsoft Upgrade Security Update for Windows Server 2003 64-bit Itanium Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=EE8BA26D-CFDA-428F-9F9B-16908DB88C80&displaylang=en

Microsoft Windows Server 2003 Enterprise x64 Edition :
Microsoft Upgrade Security Update for Windows Server 2003 x64 Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=2E8716F7-3A81-4482-8C92-2A2DC3C2F782&displaylang=en

Microsoft Windows Server 2003 Standard Edition SP1:
Microsoft Upgrade Security Update for Windows Server 2003 (KB896358) - English
http://www.microsoft.com/downloads/details.aspx?familyid=A19EEE21-7DF2-4B95-A4C5-44C6CAA5AF9A&displaylang=en

Microsoft Windows Server 2003 Standard Edition :
Microsoft Upgrade Security Update for Windows Server 2003 (KB896358) - English
http://www.microsoft.com/downloads/details.aspx?familyid=A19EEE21-7DF2-4B95-A4C5-44C6CAA5AF9A&displaylang=en

Microsoft Windows Server 2003 Standard x64 Edition :
Microsoft Upgrade Security Update for Windows Server 2003 x64 Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=2E8716F7-3A81-4482-8C92-2A2DC3C2F782&displaylang=en

Microsoft Windows Server 2003 Web Edition SP1:
Microsoft Upgrade Security Update for Windows Server 2003 (KB896358) - English
http://www.microsoft.com/downloads/details.aspx?familyid=A19EEE21-7DF2-4B95-A4C5-44C6CAA5AF9A&displaylang=en

Microsoft Windows Server 2003 Web Edition :
Microsoft Upgrade Security Update for Windows Server 2003 (KB896358) - English
http://www.microsoft.com/downloads/details.aspx?familyid=A19EEE21-7DF2-4B95-A4C5-44C6CAA5AF9A&displaylang=en

Microsoft Windows XP 64-bit Edition SP1:
Microsoft Upgrade Security Update for Windows XP 64-bit Itanium Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=A6A807F2-AD02-4D15-A198-CF8A728B3A25&displaylang=en

Microsoft Windows XP 64-bit Edition :
Microsoft Upgrade Security Update for Windows XP 64-bit Itanium Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=A6A807F2-AD02-4D15-A198-CF8A728B3A25&displaylang=en

Microsoft Windows XP 64-bit Edition Version 2003 SP1:
Microsoft Upgrade Security Update for Windows XP 64-bit Itanium Edition, Version 2003 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=EE8BA26D-CFDA-428F-9F9B-16908DB88C80&displaylang=en

Microsoft Windows XP 64-bit Edition Version 2003 :
Microsoft Upgrade Security Update for Windows XP 64-bit Itanium Edition, Version 2003 (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=EE8BA26D-CFDA-428F-9F9B-16908DB88C80&displaylang=en

Microsoft Windows XP Home SP2:
Microsoft Upgrade Security Update for Microsoft Windows XP (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=17833B94-AF70-47BD-872C-033A3F0E982A&displaylang=en

Microsoft Windows XP Home SP1:
Microsoft Upgrade Security Update for Microsoft Windows XP (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=17833B94-AF70-47BD-872C-033A3F0E982A&displaylang=en

Microsoft Windows XP Home :
Microsoft Windows XP Media Center Edition SP2:
Microsoft Upgrade Security Update for Microsoft Windows XP (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=17833B94-AF70-47BD-872C-033A3F0E982A&displaylang=en

Microsoft Windows XP Media Center Edition SP1:
Microsoft Upgrade Security Update for Microsoft Windows XP (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=17833B94-AF70-47BD-872C-033A3F0E982A&displaylang=en

Microsoft Windows XP Media Center Edition :
Microsoft Windows XP Professional SP2:
Microsoft Upgrade Security Update for Microsoft Windows XP (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=17833B94-AF70-47BD-872C-033A3F0E982A&displaylang=en

Microsoft Windows XP Professional SP1:
Microsoft Upgrade Security Update for Microsoft Windows XP (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=17833B94-AF70-47BD-872C-033A3F0E982A&displaylang=en

Microsoft Windows XP Professional :
Microsoft Windows XP Professional x64 Edition :
Microsoft Upgrade Security Update for Windows XP x64 Edition (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=CE81AE3B-4FA4-4576-8539-AB49E575A98F&displaylang=en

Microsoft Windows XP Tablet PC Edition SP2:
Microsoft Upgrade Security Update for Microsoft Windows XP (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=17833B94-AF70-47BD-872C-033A3F0E982A&displaylang=en

Microsoft Windows XP Tablet PC Edition SP1:
Microsoft Upgrade Security Update for Microsoft Windows XP (KB896358)
http://www.microsoft.com/downloads/details.aspx?familyid=17833B94-AF70-47BD-872C-033A3F0E982A&displaylang=en

Microsoft Windows XP Tablet PC Edition :

References
Source: Microsoft Security Bulletin MS05-026
URL: http://www.microsoft.com/technet/security/bulletin/MS05-026.mspx

Credits
Discovery of this issue is credited to Peter Winter-Smith with Next Generation Security Software Ltd and eEye Digital Security.


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Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.

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