Microsoft KB Archive/826437

= FIX: &quot;HTTP 400 - Bad request&quot; error message in the .NET Framework 1.1 =

Article ID: 826437

Article Last Modified on 3/9/2007

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APPLIES TO


 * Microsoft ASP.NET 1.1

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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
When you run the Microsoft .NET Framework 1.1, and then you visit a URL that contains a second colon (&quot;:&quot;), you receive the following error message:

1.1 - HTTP 400 - Bad Request

For example, the following URL generates this error message:

http:// / / .aspx/http://www.wingtiptoys.com

Note You may also receive this error message if the URL contains the following characters:





Service pack information
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To browse URLs that contain the characters that are mentioned in the &quot;Symptoms&quot; section, obtain the latest service pack for the Microsoft .NET Framework 1.1. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

885055 How to obtain Microsoft .NET Framework 1.1 Service Pack 1

Registry information
Important If you enable this fix, you increase the attack surface of the application. You should not enable this fix unless the application requires it.

After you install the service pack, set the following registry key to enable the fix:



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in the .NET Framework 1.1 Service Pack 1.



MORE INFORMATION
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbqfe kbhotfixserver kbnetframe110sp1fix kbfix kbbug KB826437

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