MS04-023: Vulnerability in HTML Help could allow code execution

Support for Windows XP has ended

Microsoft ended support for Windows XP on April 8, 2014. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

Support for Windows Server 2003 ended on July 14, 2015

Microsoft ended support for Windows Server 2003 on July 14, 2015. This change has affected your software updates and security options. Learn what this means for you and how to stay protected.

This article has been archived. It is offered "as is" and will no longer be updated.
Microsoft has released security bulletin MS04-023. The security bulletin contains all the relevant information about the security update, including file manifest information and deployment options. To view the security bulletin, visit the following Microsoft Web site:

For additional information about the latest service pack for Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
322389 How to obtain the latest Windows XP service pack

Known issues

For security reasons, the 840135 security update prevents unsupported use of compiled HTML Help files. After you apply 840315, only files that have the .chm file name extension can be used as compiled HTML Help files. Programs that use other file name extensions for compiled HTML Help files will no longer display content by using HTML Help.

To work around this issue, the program vendor should take the following actions:
  • Update their program to support or to use compiled HTML Help files that are named with the .chm file name extension.
  • Update any existing compiled HTML Help files to have the .chm file name extension.
update security_patch security_update security bug flaw vulnerability malicious attacker exploit registry unauthenticated showHelp HTMLhelp remote code execution URL local machine zone LMZ specially-formed scope specially-crafted WinXP Win2003 TSE WinNT Win2000
Properties

Article ID: 840315 - Last Review: 12/08/2015 06:55:17 - Revision: 3.5

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