You receive a "400 - BadRequest" error message from Internet Information Services 6.0 (835880)


The information in this article applies to:

  • Microsoft Internet Information Services version 6.0

SYMPTOMS

When you send a request to a Microsoft Windows Server 2003-based computer that is running Microsoft Internet Information Services (IIS) 6.0, you may receive an error message that is similar to the following:
HTTP/1.1 GET / 400 - BadRequest

CAUSE

This issue occurs if the request headers are terminated with only the line feed (LF) delimiter or the 0x0A delimiter. By default, IIS 6.0 requires that request headers are terminated with the carriage return line feed (CRLF) delimiter or the 0x0D0A delimiter.

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 Windows Server 2003 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

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. 
Date         Time   Version            Size    File name
--------------------------------------------------------
01-Apr-2004  00:47  5.2.3790.146      335,872  Http.sys (x86)
01-Apr-2004  00:48  5.2.3790.146      851,968  Http.sys (IA-64)

MORE INFORMATION

The carriage return delimiter can be represented by CR or by 0xD. The line feed delimiter can be represented by LF or by 0xA. The carriage return line feed delimiter can be represented by CRLF or by 0x0D0A.
Modification Type:MinorLast Reviewed:10/26/2005
Keywords:kbHotfixServer kbQFE kbHotfixServer kbQFE kbprb kbfix kbBug kbQFE kbWinServ2003preSP1fix KB835880 kbAudDeveloper
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