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Microsoft Security Bulletin (MS00-064)
From: Microsoft Product Security <secnotif () MICROSOFT COM>
Date: Wed, 6 Sep 2000 18:04:45 -0700
The following is a Security Bulletin from the Microsoft Product Security Notification Service. Please do not reply to this message, as it was sent from an unattended mailbox. ******************************** -----BEGIN PGP SIGNED MESSAGE----- Microsoft Security Bulletin (MS00-064) - --------------------------------------- Patch Available for "Unicast Service Race Condition" Vulnerability Originally posted: September 06, 2000 Summary ======= Microsoft has released a patch that eliminates a security vulnerability in Microsoft(r) Windows Media(tm) Services. The vulnerability could allow a malicious user to prevent an affected server from providing useful service. Frequently asked questions regarding this vulnerability and the patch can be found at http://www.microsoft.com/technet/security/bulletin/fq00-064.asp Issue ====== If a client sends a particular type of malformed request to a Windows Media server, it could induce a race condition. Once the server has been put into such a state, subsequent requests - even ones that would normally be legitimate - could cause the Windows Media Unicast Service to fail. If this happened, any ongoing sessions would be lost, and the server would stop providing unicast streaming media services. An affected server could be put back into service by restarting the Unicast Service. The vulnerability would not cause any data loss, nor would it enable the malicious user to usurp any administrative privileges on the machine. Affected Software Versions ========================== - Microsoft Windows Media Services 4.0 - Microsoft Windows Media Services 4.1 Patch Availability ================== - Microsoft Windows Media Services 4.1: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=24167 Note: Customers using Windows Media Services 4.0 should upgrade to Windows Media Services 4.1 and then apply the above patch. 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 MS00-064, http://www.microsoft.com/technet/security/bulletin/fq00-064.asp - Microsoft Knowledge Base article Q273014 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. Acknowledgments =============== Microsoft thanks Kit Knox of NaviSite (www.navisite.com) for reporting this issue to us and working with us to protect customers. Revisions ========= September 06, 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. All rights reserved. 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