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Microsoft Security Bulletin (MS00-088)

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



Patch Available for "Exchange User Account" Vulnerability

Originally posted: November 16, 2000



Summary

=======

Microsoft has released a patch that eliminates a security

vulnerability in Microsoft(r) Exchange 2000 Server and Exchange 2000

Enterprise Server. This vulnerability could potentially allow an

unauthorized user to remotely login to an Exchange 2000 server and

possibly other servers on the affected computer's network.



Frequently asked questions regarding this vulnerability and the patch

can be found at

http://www.microsoft.com/technet/security/bulletin/fq00-088.asp



Issue

=====

In early shipments of Exchange 2000, setup creates an account with a

known username and password. If a malicious user learned the username

and password, he or she could log onto the account. Under normal

circumstances, this account only has local user rights - it is not a

privileged account and cannot access Exchange 2000 data. However, if

Exchange 2000 were installed on a Domain Controller, the account

would also have Domain user privileges, and could thus gain access to

other resources in the affected Domain. Nevertheless, he would still

be restricted from accessing Exchange 2000 data.



To eliminate the security vulnerability, Microsoft has provided a

manual procedure, discussed in the FAQ, and a tool to protect our

customers. Microsoft also recommends that customers affected by this

vulnerability disable or delete this account after setup completes.

In addition, Exchange 2000 SP1 will contain a fix that removes this

vulnerability.



Affected Software Versions

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

 - Microsoft Exchange 2000 Server CDs without "Rev. A" stamped on the

   CD on the line below the Part No.

 - Microsoft Exchange 2000 Enterprise Server CDs without "Rev. A"

   stamped on the CD below the Part No.



Note: This also applies to evaluation editions and to Microsoft

Exchange 2000 Server and Microsoft Exchange 2000 Enterprise Server

included on the October 2000 Select CDs.



Patch Availability

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

 - The Tool can be downloaded from:

   http://www.microsoft.com/Downloads/Release.asp?ReleaseID=25866



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 MS00-088,

   http://www.microsoft.com/technet/security/bulletin/fq00-088.asp

 - Microsoft Knowledge Base (KB) article Q278523,

   http://www.microsoft.com/technet/support/kb.asp?ID=278523

 - 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 16, 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 November 16, 2000

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



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