Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2000.292 -- Microsoft Security Bulletin (MS00-077)
Patch Available for "NetMeeting Desktop Sharing" Vulnerability
17 October 2000
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: NetMeeting
Vendor: Microsoft
Operating System: Windows NT 4.0
Windows 2000
Impact: Denial of Service
Access Required: Remote
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Microsoft Security Bulletin (MS00-077)
- - --------------------------------------
Patch Available for "NetMeeting Desktop Sharing" Vulnerability
Originally posted: October 13, 2000
Summary
=======
Microsoft has released a patch that eliminates a security
vulnerability in NetMeeting, an application that ships with
Microsoft(r) Windows 2000 and is also available as a separate
download for Windows NT 4.0. The vulnerability could allow a
malicious user to temporarily prevent an affected machine from
providing any NetMeeting services and possibly consume 100% CPU
utilization during an attack.
Frequently asked questions regarding this vulnerability and the patch
can be found at
http://www.microsoft.com/technet/security/bulletin/fq00-077.asp
Issue
=====
A remote denial of service vulnerability has been discovered in a
component of NetMeeting. The denial of service can occur when a
malicious client sends a particular malformed string to a port which
the NetMeeting service is listening on and with Remote Desktop
Sharing enabled.
Although the NetMeeting application is provided as part of Windows
2000 products, the application and affected component is not enabled
by default, and customers who have not enabled it would not be at
risk from this vulnerability.
Affected Software Versions
==========================
NetMeeting Version 3.01 (4.4.3385) on Windows 2000 or Windows NT 4.0.
Patch Availability
==================
- Windows 2000 and Windows NT 4.0:
http://www.microsoft.com/Downloads/Release.asp?ReleaseID=25029
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 MS00-077,
http://www.microsoft.com/technet/security/bulletin/fq00-077.asp
- Microsoft Knowledge Base article Q273854 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 Kirk Corey of Diversified Software Industries, Inc.
(www.dsi-inc.net) for reporting this issue to us and working with us
to protect customers.
Revisions
=========
- October 13, 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.
Last Updated October 13, 2000
(c) 2000 Microsoft Corporation. All rights reserved. Terms of use.
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