Microsoft KB Archive/273877

= IIS shuts down and restarts for no apparent reason =

Article ID: 273877

Article Last Modified on 2/13/2007

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APPLIES TO


 * Microsoft Internet Information Services 5.0
 * Microsoft Internet Information Server 4.0

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This article was previously published under Q273877



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx



SYMPTOMS
Microsoft Internet Information Services (IIS) 5.0 or Internet Information Server (IIS) 4.0 shuts down and restarts for no apparent reason.



IIS 5.0
This problem can occur because of a known vulnerability. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

300972 MS01-033: Unchecked buffer in Index Server ISAPI extension can enable Web server compromise

Alternatively, this problem can occur when .htm documents are mapped to the Ssinc.dll file and IIS receives a request with the &quot;HEAD&quot; verb to process. This is not supported on default documents, and therefore, IIS returns a 403 error message. However, IIS fails when it handles this error condition, which causes it to shut down and then restart the IIS services.

IIS 4.0
This problem can occur because of a known vulnerability. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

300972 MS01-033: Unchecked buffer in Index Server ISAPI extension can enable Web server compromise



Service pack information
To resolve this problem, obtain the latest service pack for Windows 2000. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to obtain the latest Windows 2000 service pack

Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only 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 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer 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.

The English version of this fix should have the following file attributes or later:   Date       Time    Version       Size    File name   Platform -  09/12/2000 07:37p  5.0:2195.2194 357,136 W3svc.dll   x86

IIS 4.0
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that you determine are at risk of attack. Evaluate the computer's physical accessibility, network and Internet connectivity, and other factors to determine the degree of risk to the computer. See the associated Microsoft Security Bulletin to help determine the degree of risk. This hotfix may receive additional testing. If the computer is sufficiently at risk, we recommend that you apply this hotfix now.

To resolve this problem immediately, download the hotfix by following the instructions later in this article or 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. The following file is available for download from the Microsoft Download Center:

Download the Q300972i.exe package now. Release Date: June 18, 2001

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

The English version of this fix should have the following file attributes or later:   Date         Time  Version     Size     File name -  May-25-2001  1436  5.0.1781.3  193,296  Idq.dll Note Due to file dependencies, this hotfix requires Microsoft Windows NT 4.0 Service Pack 6a.



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

Additional query words: HTTP Error 403 Authorization Forbidden denied win2k sp2

Keywords: kbhotfixserver kbbug kbfix kbqfe KB273877

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