Microsoft KB Archive/238349

= Specially-Malformed Header in GET Request Creates Denial of Service =

Article ID: 238349

Article Last Modified on 6/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Internet Information Server 4.0
 * Microsoft Site Server 3.0 Standard Edition
 * Microsoft Commercial Internet System 2.0
 * Microsoft Commercial Internet System 2.5
 * Microsoft Site Server 3.0 Commerce Edition

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This article was previously published under Q238349



SYMPTOMS
A specially-malformed header in a GET request can create a Denial of Service in the W3 server and use all available memory on the Web server, causing Internet Information Server (IIS) to stop responding to any request.



Windows NT Server or Workstation 4.0 and Internet Information Server
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:


 * http://www.microsoft.com/windows/servicepacks/ -or-


 * 152734how to obtain the latest windows nt 4.0 service pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp

Windows NT Server 4.0, Terminal Server Edition
To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Internet Information Server 4.0. This problem was first corrected in Windows NT Server version 4.0, Terminal Server Edition Service Pack 6.Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition.

This problem was first corrected in Windows NT Server 4.0 Service Pack 6 and Windows NT Server 4.0, Terminal Server Edition Service Pack 6.

Keywords: kbbug kbfix kbhotfixserver kbqfe KB238349

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