Microsoft Security Bulletin (MS00-062)

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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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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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