Microsoft KB Archive/835987

= You may receive an error message when you browse an IIS 6.0 Web site =

Article ID: 835987

Article Last Modified on 7/24/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems

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SYMPTOMS
When you browse a Microsoft Internet Information Services (IIS) 6.0 Web site, you may receive an error message that is similar to the following:

The page cannot be found. HTTP 400 – Bad Request

Note If the Show friendly HTTP error messages check box is not selected in Microsoft Internet Explorer, you may receive an error message that is similar to the following:

Bad Request (Invalid Header Name)



CAUSE
This problem occurs when the browser sends a linear white space to the IIS 6.0 Web server, and the linear white space is between the HTTP request line and the start of the HTTP request header. For example, this problem may occur if the browser sends a space character (0x20) that is between the HTTP request line and the start of the HTTP request header. Subsequently, IIS 6.0 interprets the space character that is between the HTTP request line and the start of the HTTP request header as not valid.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
No prerequisites are required.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

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.

Windows Server 2003, 32-bit versions
  Date         Time   Version            Size    File name --  19-Feb-2004  18:44  5.2.3790.131      337,408  Http.sys

Windows Server 2003, Enterprise Edition for Itanium-based Systems
  Date         Time   Version            Size    File name --  19-Feb-2004  18:44  5.2.3790.131      855,040  Http.sys



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For additional 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

Keywords: kbhotfixserver kbqfe kbhotfixserver kbqfe kbbug kbfix kbqfe kbwinserv2003presp1fix KB835987

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