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ESB-2003.0279 -- Microsoft Security Bulletin MS00-084 -- Patch Available for 'Indexing Services Cross Site Scripting' Vulnerability

Date: 11 April 2003
References: ESB-2000.023  ESB-2000.025  ESB-2000.327  

Click here for printable version
Click here for PGP verifiable version
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===========================================================================
             AUSCERT External Security Bulletin Redistribution

           ESB-2003.0279 -- Microsoft Security Bulletin MS00-084
       Patch Available for 'Indexing Services Cross Site Scripting'
                               Vulnerability
                               11 April 2003

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                Microsoft Indexing Services
Vendor:                 Microsoft
Operating System:       Windows 2000
                        Windows NT
Impact:                 Execute Arbitrary Code/Commands
Access Required:        Remote
CVE Names:              CVE-2000-0942

Ref:                    ESB-2000.327
                        ESB-2000.025
                        ESB-2000.023

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- - - -----------------------------------------------------------------
Title:      Patch Available for 
            'Indexing Services Cross Site Scripting' Vulnerability
Released:   02 November 2000
Revised:    09 April 2003 (version 2.0)
Software:   Microsoft Indexing Services for Windows 2000
            Microsoft Indexing Services for Windows NT 4.0
Impact:     Cross Site Scripting
Bulletin:   MS00-084

Microsoft encourages customers to review the Security Bulletin at: 
http://www.microsoft.com/technet/security/bulletin/MS00-084.asp
- - - -----------------------------------------------------------------

Reason for Revision:
====================
Subsequent to the release of this bulletin, it was discovered
that an available package for the version of the Indexing Service
which shipped with the NT 4.0 Option Pack had never been released.
The bulletin is being updated to include the download locations for
that version of the fix.

Issue:
======
On February 20, 2000, Microsoft and the CERT Coordination Center
published information on a newly-identified security vulnerability
affecting all web server products. This vulnerability, known as
Cross-Site Scripting (CSS), results when web applications don't
properly validate inputs before using them in dynamic web pages.
If a malicious web site operator were able to lure a user to his
site, and had identified a third-party web site that was vulnerable
to CSS, he could potentially use the vulnerability to "inject" 
script into a web page created by the other web site, which would
then be delivered to the user. The net effect would be to cause
the malicious user's script to run on the user's machine using
the trust afforded the other site. 

The vulnerability can affect any software that runs on a web
server, accepts user input, and uses it to generate web pages
without sufficient validation. Microsoft has identified an
Indexing Service component (CiWebHitsFile) that, when called
from a specially crafted URL, is vulnerable to this scenario. 

Mitigating Factors:
===================
 -  The Indexing Service ships and installs with Windows 2000,
    but is not enabled by default.
 -  The Indexing Service for Windows NT 4.0 ships with the
    NT Option Pack, and is not installed or enabled by default.

Patch Availability:
===================
 - A patch is available to fix this vulnerability. Please read the 
   Security Bulletins at
   http://www.microsoft.com/technet/security/bulletin/ms00-084.asp
   for information on obtaining this patch.

Acknowledgment:
===============
 - Eiji "James" Yoshida <mailto:ptrs-ejy@bp.iij4u.or.jp>

- - - -----------------------------------------------------------------

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS 
PROVIDED"AS IS "WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS 
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES 
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO 
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR 
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, 
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT 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.



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