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Microsoft Security Bulletin (MS00-053)
- --------------------------------------

Patch Available for "Service Control Manager Named Pipe
Impersonation" Vulnerability

Originally posted: August 02, 2000

Summary
=======
Microsoft has released a patch that eliminates a security
vulnerability in Microsoft(r) Windows 2000(r). The vulnerability
could allow a user logged onto a Windows 2000 machine from the
keyboard to become an administrator on the machine.

Frequently asked questions regarding this vulnerability
and the patch can be found at
http://www.microsoft.com/technet/security/bulletin/fq00-053.asp

Issue
=====
The Service Control Manager (services.exe) is an administrative tool
provided in Windows 2000 that allows system services  (Server,
Workstation, Alerter, ClipBook, etc.) to be created or modified. The
SCM creates a named pipe for each service as it  starts, however,
should a malicious program predict and create the named pipe for a
specific service before the service  starts, the program could
impersonate the privileges of the service. This could allow the
malicious program to run in the  context of the given service, with
either specific user or LocalSystem privileges.

The primary risk from this vulnerability is that a malicious user
could exploit this vulnerability to gain additional  privileges on
the local machine. A malicious user would require the ability to log
onto the target machine interactively and  run arbitrary programs in
order to exploit this vulnerability, and as a result, workstations
and terminal servers would be at  greatest risk.

Affected Software Versions
==========================
 - Microsoft Windows 2000 Professional
 - Microsoft Windows 2000 Server
 - Microsoft Windows 2000 Advanced Server

Patch Availability
==================
 - Windows 2000:
   http://www.microsoft.com/Downloads/Release.asp?ReleaseID=23432

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 MS00-053,
   http://www.microsoft.com/technet/security/bulletin/fq00-053.asp
 - Microsoft Knowledge Base article Q269523 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 the R&D department of Guardent (www.guardent.com)
for reporting this issue to us and working with us to  protect
customers.

Revisions
=========
August 02, 2000: Bulletin Created.

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

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SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last Updated August 2, 2000

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

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