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Microsoft Security Bulletin (MS00-072)

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



Patch Available for "Share Level Password" Vulnerability

Originally posted: October 10, 2000



Summary

=======

Microsoft has released a patch that eliminates a security

vulnerability in Microsoft(r) Windows 95, 98, 98SE, and Windows Me.

The vulnerability could allow a malicious user to programmatically

access a Windows 9x/ME file share without knowing the entire password

assigned to that share.



Frequently asked questions regarding this vulnerability and the patch

can be found at

http://www.microsoft.com/technet/security/bulletin/fq00-072.asp



Issue

=====

Microsoft Windows 9x/Me provides a password protection feature

referred to as (share level access) for the File and Print Sharing

service. However, due to the way the password feature is currently

implemented, a file share could be compromised, by a malicious user

who used a special client utility, without that user knowing the

entire password required to access that share.



Only share level access permissions are vulnerable. If a Windows 9x

or Windows Me machine were part of a Windows NT domain, user-level

access controls could be enforced on file shares and passwords would

not be needed to allow access to those shares. Windows NT and Windows

2000 machines can only be setup with user-level file share access

controls and are not susceptible to this vulnerability.



Affected Software Versions

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

Microsoft Windows 95

Microsoft Windows 98

Microsoft Windows 98 Second Edition

Microsoft Windows Me



Patch Availability

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

Microsoft Windows 95

Patch available shortly

Microsoft Windows 98 and 98 Second Edition

http://download.microsoft.com/download/win98SE/Update/11958/W98/EN-US/

273991USA8.EXE

Microsoft Windows Me

http://download.microsoft.com/download/winme/Update/11958/WinMe/EN-US/

273991USAM.EXE



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 MS00-072,

http://www.microsoft.com/technet/security/bulletin/fq00-072.asp

Microsoft Knowledge Base article Q273991 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 Nsfocus Security Team (http://www.nsfocus.com) for

reporting this issue to us and working with us to protect customers.



Revisions

October 10, 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 10, 2000

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



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