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Q276489: Patch Available for Web Server Folder Traversal Vulnerability

Article: Q276489
Product(s): Internet Information Server
Version(s): 4.0,5.0
Operating System(s): 
Keyword(s): kbWin2000PreSP2Fix
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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IMPORTANT: If you download and install the fix included in this article onto a computer running IIS 3.0, the IIS 3.0 Web, FTP, and Proxy services will fail.  This fix should only be applied to computers running IIS 4.0 or later.  To verify your version of IIS, follow these steps:

1. Click Start, click Settings, and then click Control Panel.

2. Double-click Administrative Tools, and then click the Services icon.

3. In the Services list, locate the IIS Admin Service.

If the IIS Admin Service is listed, download and apply the fix included in this article.  

If the IIS Admin Service is not listed, your version of IIS is not vulnerable to the problem that is corrected by these fixes.  Therefore, no action is needed. IIS 3.0 is not vulnerable and does not need this fix.

SYMPTOMS
========

A security vulnerability exists in Internet Information Services 5.0 and
Internet Information Server 4.0 that may allow a malicious user to gain access
to files and folders that are located on the logical drive containing the Web
folders. This vulnerability can potentially allow a Web site visitor to take a
wide range of destructive actions against it, including running programs on it.

RESOLUTION
==========

This vulnerability is eliminated by the patch that accompanied the Microsoft
File Permission Canonicalization Vulnerability
(http://www.microsoft.com/technet/security/bulletin/ms00-057.asp) Security
Bulletin.

Customers who have applied the patch from MS00-057 are already protected against
this vulnerability and do not need to take additional action. If you are using
IIS 4.0 or IIS 5.0, Microsoft strongly urges you to apply the patch immediately,
if you have not already done so. For additional information about how to obtain
this patch, click the article number below to view the article in the Microsoft
Knowledge Base:

  Q269862 Patch Released for Canonicalization Error Issue

STATUS
======

Microsoft has confirmed this to be a problem in the Microsoft products that are
listed at the beginning of this article.

MORE INFORMATION
================

Additional information about this issue is available from the following
Microsoft Web site:

  http://www.microsoft.com/technet/security/bulletin/MS00-078.asp

  http://www.microsoft.com/technet/security/bulletin/MS00-086.asp


The English version of the IIS 5.0 fix should have the following file attributes
or later:

  Date        Time    Version        Size     File name
  -----------------------------------------------------
  08-09-2000  1:02pm  5.0.2195.2103  357,136  W3svc.dll

The English version of the IIS 4.0 fix should have the following file attributes
or later:

  Date        Time    Size     File name     Platform
  ---------------------------------------------------
  08/03/2000  05:06p  330,080  Asp.dll       Intel
  08/03/2000  05:04p  185,792  Infocomm.dll  Intel
  08/03/2000  05:05p   38,256  Ssinc.dll     Intel
  08/03/2000  05:05p   25,360  Sspifilt.dll  Intel
  08/03/2000  05:05p  228,496  W3svc.dll     Intel

  08/03/2000  05:08p  551,696  Asp.dll       Alpha
  08/03/2000  05:06p  304,912  Infocomm.dll  Alpha
  08/03/2000  05:07p   60,176  Ssinc.dll     Alpha
  08/03/2000  05:07p   39,696  Sspifilt.dll  Alpha
  08/03/2000  05:07p  384,272  W3svc.dll     Alpha

Additional query words:

======================================================================
Keywords          : kbWin2000PreSP2Fix 
Technology        : kbiisSearch kbiis500 kbiis400
Version           : :4.0,5.0
Hardware          : x86
Issue type        : kbbug
Solution Type     : kbfix

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