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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2000.327 -- Microsoft Security Bulletin (MS00-084) Patch Available for "Indexing Services Cross Site Scripting" Vulnerability 3 November 2000 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Indexing Services Vendor: Microsoft Operating System: Windows 2000 Impact: Execute Arbitrary Code/Commands Access Required: Remote Ref: ESB-2000.025 ESB-2000.023 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Microsoft Security Bulletin (MS00-084) - - -------------------------------------- Patch Available for "Indexing Services Cross Site Scripting" Vulnerability Originally posted: November 02, 2000 Summary ======= Microsoft has released a patch that eliminates a security vulnerability in Microsoft(r) Indexing Services for Windows 2000. This vulnerability could allow a malicious web site operator to misuse another web site as a means of attacking users. Frequently asked questions regarding this vulnerability and the patch can be found at http://www.microsoft.com/technet/security/bulletin/fq00-084.asp 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. Affected Software Versions ========================== - Microsoft Indexing Services for Windows 2000 NOTE: The Indexing Service ships and installs with Windows 2000, but is not enabled by default. Users who are running web servers on Windows 2000 who have enabled Indexing Services are urged to apply this patch. Patch Availability ================== - Indexing Services for Windows 2000: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=25517 NOTE: Additional security patches are available at the Microsoft Download Center More Information ================ Please see the following references for more information related to this issue. - Frequently Asked Questions: Microsoft Security Bulletin MS00-084, http://www.microsoft.com/technet/security/bulletin/fq00-084.asp - Information on Cross-Site Scripting Security Vulnerability, http://www.microsoft.com/technet/security/crssite.asp. - CERT(r) Advisory CA-2000-02: Malicious HTML Tags Embedded in Client Web Requests, http://www.cert.org/advisories/CA-2000-02.html - Microsoft Knowledge Base article Q278499 discusses this issue and will be available soon. - Microsoft TechNet Security web site, http://www.microsoft.com/technet/security/default.asp Obtaining Support on this Issue =============================== This is a fully supported patch. Information on contacting Microsoft Product Support Services is available at http://support.microsoft.com/support/contact/default.asp. Revisions ========= - November 02, 2000: Bulletin Created. - - ------------------------------------------------------------- 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. (c) 2000 Microsoft Corporation. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the original authors to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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