Q273877: IIS Shuts Down and Restarts for No Apparent Reason
Article: Q273877
Product(s): Internet Information Server
Version(s): 4.0,5.0
Operating System(s):
Keyword(s):
Last Modified: 08-MAY-2002
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The information in this article applies to:
- Microsoft Internet Information Services version 5.0
- Microsoft Internet Information Server version 4.0
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SYMPTOMS
========
Internet Information Services (IIS) 5.0 or Internet Information Server (IIS) 4.0
shuts down and restarts for no apparent reason.
CAUSE
=====
IIS 5.0:
This problem can occur because of a known vulnerability. For additional
information, click the article number below to view the article in the Microsoft
Knowledge Base:
Q300972 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 "HEAD" 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 additional
information, click the article number below to view the article in the Microsoft
Knowledge Base:
Q300972 Unchecked Buffer in Index Server ISAPI Extension Can Enable Web
Server Compromise
RESOLUTION
==========
IIS 5.0:
A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem. This fix may receive additional
testing at a later time, to further ensure product quality. Therefore, if you
are not severely affected by this problem, Microsoft recommends that you wait
for the next Windows 2000 service pack that contains this fix.
To resolve this problem immediately, contact Microsoft Product Support Services
to obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information about support costs, please go to the following
address on the World Wide Web:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS
NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal 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 fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems that are determined to be at risk of attack. Please evaluate your
computer's physical accessibility, network and Internet connectivity, and other
factors to determine the degree of risk to your computer. Please see the
associated Microsoft Security Bulletin
(http://www.microsoft.com/technet/security/bulletin/MS01-033.asp) to help make
this determination. This fix may receive additional testing at a later time, to
further ensure product quality. If your computer is sufficiently at risk,
Microsoft recommends that you apply this fix now.
To resolve this problem immediately, download the fix as instructed below or
contact Microsoft Product Support Services to obtain the fix. 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/default.aspx?scid=fh;EN-US;CNTACTMS
NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal 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:
DownloadDownload Q300972i.exe now
(http://www.microsoft.com/ntserver/nts/downloads/critical/q300972/default.asp)
Release Date: Monday, June 18, 2001
For additional information about how to download Microsoft Support files, click
the article number below to view the article in the Microsoft Knowledge Base:
Q119591 How to Obtain Microsoft Support Files from Online Services
Microsoft used the most current virus detection software available on the date of
posting to scan this file for viruses. After it is posted, the file is housed on
secure servers that 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 this to be a problem in the Microsoft products that are
listed at the beginning of this article.
Additional query words: HTTP Error 403 Authorization Forbidden denied win2k sp2
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Keywords :
Technology : kbiisSearch kbiis500 kbiis400
Version : :4.0,5.0
Hardware : ALPHA x86
Issue type : kbbug
Solution Type : kbfix
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