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Microsoft Security Bulletin (MS00-062)

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



Patch Available for "Local Security Policy Corruption" Vulnerability



Originally posted: August 28, 2000



Summary

=======

Microsoft has released a patch that eliminates a security

vulnerability in Microsoft(r) Windows(r) 2000. The vulnerability

could allow a malicious user to disrupt normal operation of an

affected machine, and potentially of an entire network.  Customers

who have applied Windows 2000 Service Pack 1 are already protected

against the vulnerability and do not need to  take any further

action.



Frequently asked questions regarding this vulnerability and the

patch can be found at

http://www.microsoft.com/technet/security/bulletin/fq00-062.asp



Issue

=====

This vulnerability could allow a malicious user to corrupt parts of a

Windows 2000 system's local security policy, with the  effect of

disrupting domain membership and trust relationship information. If a

workstation or member server were attacked  via this vulnerability,

it would effectively remove the machine from the domain; if a domain

controller were attacked, it  could no longer process domain logon

requests. Recovering from such an attack would likely require that a

known-working  configuration be restored from backup.



It would not be necessary to be an authenticated domain member in

order to mount an attack via this vulnerability. Any user  who could

establish a RPC connection with an affected machine and send the

proper command sequence to it could exploit the  vulnerability. If

the malicious user were an intranet user, he could likely attack any

machine within the network; if the  malicious user were on the

Internet, he could likely attack only machines on the network edge

that allow RPC connections.



The vulnerability was discovered by an internal security team at

Microsoft, and, to the best of our knowledge, it is not  known "in

the wild". Nevertheless, because of the serious consequences of the

vulnerability, Microsoft encourages all Windows  2000 users to either

apply the patch or Windows 2000 Service Pack 1 immediately.



Affected Software Versions

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

 - Microsoft Windows 2000 Professional

 - Microsoft Windows 2000 Server

 - Microsoft Windows 2000 Advanced Server



Note: Microsoft Windows 2000 Datacenter Server is not affected by

this vulnerability.



Patch Availability

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

 - http://www.microsoft.com/Downloads/Release.asp?ReleaseID=24019



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 MS00-062,

   http://www.microsoft.com/technet/security/bulletin/fq00-062.asp

 - Microsoft Knowledge Base article Q269609 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

=========

 - August 28, 2000: Bulletin Created.



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

- -



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"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 August 28, 2000



(c) 2000 Microsoft Corporation. All rights reserved. Terms of use





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