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   Allaire Security Bulletin (ASB00-20)
   Microsoft: Patch Available for "Absent Directory Browser Argument"
   Vulnerability
   
   Originally Posted: July 31, 2000
   Last Updated: July 31, 2000
   Summary
   
   Microsoft has released a patch that eliminates two security
   vulnerabilities in Microsoft(r) Internet Information Server. In sum,
   the vulnerabilities could allow a malicious user to stop the web
   server from providing useful service, or to extract certain types of
   information from it. This is not a problem with ColdFusion Server
   itself, but it is an issue that can affect ColdFusion users. Allaire
   recommends that customers follow the instructions posted on the
   Microsoft Web site to address this issue.
   Issue
   
   This issue is clearly explained in the Microsoft Security Bulletin:
        There are two vulnerabilities at issue here:
   
   o The Absent Directory Browser Argument vulnerability. An
   administrative script installed as part of IIS 3.0 but preserved on
   upgrade to IIS 4.0 or IIS 5.0 does not correctly handle the case where
   an expected argument is missing. The absence of the argument causes
   the script to go into an infinite loop, at which point the script
   consumes all CPU resources on the server. In addition, the permissions
   on this tool and several related ones, which were appropriate under
   IIS 3.0, are inappropriate under IIS 4.0 and 5.0. This could allow web
   site visitors to use these tools, which provide the ability to view
   the directory structure on the server.
   o A new variant on the File Fragment Reading via .HTR vulnerability.
   The original version of this vulnerability was discussed in Microsoft
   Security Bulletin MS00-031. The new vulnerability differs only in the
   specific way that it could be exploited like the original version, the
   effect of the vulnerability is that fragments of .ASP and other files
   could potentially be retrieved from the server. As in the original
   version, the mechanics of the new variant make it likely that the
   parts of an .ASP file most interesting to a malicious user would be
   stripped out.
   Source: Microsoft Security Bulletin (MS00-044) [online]. [Redmond,
   Washington, USA] : Microsoft, July 2000 [cited 28 July 2000].
   Available from World Wide Web:
   <[4]http://www.microsoft.com/technet/security/bulletin/ms00-044.asp>.
   
   Affected Software Versions
     * Microsoft Internet Information Server 4.0
     * Microsoft Internet Information Server 5.0
       
   What Allaire is Doing
   
   This is not an Allaire product. We are recommending that customers
   reference the information at Microsoft's site to address this issue.
   What Customers Should Do
   
   There is a patch available to correct this problem. It is detailed in
   the following Microsoft Security Bulletin (MS00-044):
   
   [5]http://www.microsoft.com/technet/security/bulletin/ms00-044.asp.
   
   Please note: this issue and patch may not be required for all users.
   Allaire customers should review all material in the Microsoft Security
   Bulletin and related documents carefully before applying the patch. As
   always, customers should test patch changes in a testing environment
   before modifying production servers.
   Revisions
   July 31, 2000 -- Bulletin first created. Reporting Security Issues
   Allaire is committed to addressing security issues and providing
   customers with the information on how they can protect themselves. If
   you identify what you believe may be a security issue with an Allaire
   product, please send an email to secure@allaire.com. We will work to
   appropriately address and communicate the issue.
   
   Receiving Security Bulletins
   When Allaire becomes aware of a security issue that we believe
   significantly affects our products or customers, we will notify
   customers when appropriate. Typically this notification will be in the
   form of a security bulletin explaining the issue and the response.
   Allaire customers who would like to receive notification of new
   security bulletins when they are released can sign up for our security
   notification service.
   
   For additional information on security issues at Allaire, please visit
   the Security Zone at:
   [6]http://www.allaire.com/security.
   THE INFORMATION PROVIDED BY ALLAIRE IN THIS BULLETIN IS PROVIDED "AS
   IS" WITHOUT WARRANTY OF ANY KIND. ALLAIRE DISCLAIMS ALL WARRANTIES,
   EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY
   AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ALLAIRE
   CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER
   INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF
   BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF ALLAIRE CORPORATION OR
   ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
   SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR
   CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY
   NOT APPLY.
   
   Allaire reserves the right, from time to time, to update the
   information in this document with current information.
   
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References

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   3. javascript:history.back()
   4. http://www.microsoft.com/technet/security/bulletin/ms00-044.asp
   5. http://www.microsoft.com/technet/security/bulletin/ms00-044.asp
   6. http://www.allaire.com/security
   7. http://www.allaire.com/developer/year2000
   8. mailto:webmaster@allaire.com
   9. mailto:info@allaire.com
  10. http://www.allaire.com/privacy/