FIX: Error message when you try to go to an ASP.NET page by using a URL that contains Unicode characters: "HTTP error 400 'bad request'"

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Article ID: 911276 - View products that this article applies to.
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SYMPTOMS

When you try to go to a Microsoft ASP.NET page by using a URL that contains Unicode characters, you may receive the following HTTP error message:
HTTP Error 400 'Bad Request'
Note This problem may occur when you use East Asian character sets.

CAUSE

This problem occurs because the URL contains certain double-byte character set (DBCS) characters that cause ASP.NET to reject the request incorrectly.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

You must have the .NET Framework 2.0 installed to apply this hotfix.

Restart requirement

You must restart the computer after you apply this hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
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File nameFile versionFile sizeDateTimePlatform
Aspnet.wp.exe2.0.50727.6223,04021-Jan-200612:08x86
System.web.dll2.0.50727.625,025,79221-Jan-200612:09x86
Webengine.dll2.0.50727.62299,52021-Jan-200612:08x86

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more information, 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

Properties

Article ID: 911276 - Last Review: September 22, 2011 - Revision: 2.0
APPLIES TO
  • Microsoft .NET Framework 2.0
Keywords: 
kbhotfixserver kbfix kbqfe KB911276

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