Microsoft KB Archive/231452

= Update Available for "Legacy ActiveX Control" Issue =

Article ID: 231452

Article Last Modified on 2/26/2007

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APPLIES TO


 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 4.01 Service Pack 2
 * Microsoft Internet Explorer 4.01 Service Pack 1
 * Microsoft Internet Explorer 4.01 128-Bit Edition
 * Microsoft Internet Explorer 4.0 128-Bit Edition
 * Microsoft Internet Explorer 3.02
 * Microsoft Internet Explorer 3.01
 * Microsoft Internet Explorer 3.0
 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 4.01 Service Pack 2
 * Microsoft Internet Explorer 4.01 Service Pack 1
 * Microsoft Internet Explorer 4.01 128-Bit Edition
 * Microsoft Internet Explorer 4.0 128-Bit Edition
 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 4.01 Service Pack 2
 * Microsoft Internet Explorer 4.01 Service Pack 1
 * Microsoft Internet Explorer 4.01 128-Bit Edition
 * Microsoft Internet Explorer 4.0 128-Bit Edition
 * Microsoft Internet Explorer 3.02
 * Microsoft Internet Explorer 3.01
 * Microsoft Internet Explorer 3.0

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This article was previously published under Q231452



IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SUMMARY
A potential security vulnerability has been found in the Preloader ActiveX control. This control could be used by a malicious Web site administrator to obtain a list of files from your local hard disk. This control has been removed from the Microsoft Web site, and updates are available that prevent this control from running in Internet Explorer. For more information about this issue, visit the following Microsoft Web site:

http://www.microsoft.com/TechNet/security/bulletin/ms99-018.asp



MORE INFORMATION
This problem is resolved in Internet Explorer 5.01 and later. Microsoft recommends that you upgrade to the latest version of Internet Explorer to resolve this problem. For additional information about how to determine the version of Internet Explorer that is installed on your computer, click the following article number to view the article in the Microsoft Knowledge Base:

164539 How to Determine Which Version of Internet Explorer Is Installed

For additional information about how to obtain the latest version of Internet Explorer 5.5, click the following article number to view the article in the Microsoft Knowledge Base:

267954 How to Obtain the Latest Internet Explorer 5.5 Service Pack

For additional information about how to obtain the latest version of Internet Explorer 6, click the following article number to view the article in the Microsoft Knowledge Base:

328548 How to Obtain the Latest Internet Explorer 6 Service Pack

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. To verify that you are not vulnerable to this security issue, follow these steps:  Use Registry Editor to locate and then click the following key in the Windows registry:

 

 Make sure that the   key exists under the   key. If the   key does not exist, follow these steps:  On the Edit menu, point to New, and then click Key. Type {16E349E0-702C-11CF-A3A9-00A0C9034920}, and then press ENTER.  Click the   key, and then in the right pane, make sure that the   registry value exists. If the   value does not exist, follow these steps:  On the Edit menu, point to New, and then click Binary (Windows 95 or Windows 98) or DWORD Value (Windows NT 4.0).</li> Type Compatibility Flags, and then press ENTER.</li></ol> </li> In the right pane, double-click the   value, and then make sure that the setting for the value is either   (Windows 95 or Windows 98) or   (Windows NT 4.0).</li></ol>

If the   key does not exist, if the   value does not exist, or if the   value is not set to   (Windows 95 or Windows 98) or   (Windows NT 4.0), you may be vulnerable to the Legacy ActiveX control issue.

Additional query words: 1.0 1.00 2.0 2.00 3.00 4.00 5.0 5.00

Keywords: kbenv kbprb KB231452

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