Microsoft Security Bulletin (MS00-008)

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Microsoft Security Bulletin (MS00-008)
--------------------------------------

Patch Available for "Registry Permissions" Vulnerability

Originally Posted: March 09, 2000

Summary
=======
Microsoft has released a tool that installs tighter permissions on three
sets of registry values in Microsoft(r) Windows NT  4.0. The default
permissions could allow a malicious user to gain additional privileges on a
machine that they can  interactively log onto.

Frequently asked questions regarding this vulnerability can be found at
http://www.microsoft.com/technet/security/bulletin/fq00-008.asp.

Issue
=====
This vulnerability involves three sets of registry keys whose default
permissions are too permissive. These permissions could  allow a malicious
user who could interactively log onto a target machine to:
 - Cause code to run in a local system context.
 - Cause code to run the next time another user logged onto the
   same machine.
 - Disable the security protection for a previously-reported vulnerability.

These three key sets are not related to each other except by the fact that
their permissions should be tightened. A tool is  available that will reset
all of the affected keys to the correct default value.

Affected Software Versions
==========================
 - Microsoft Windows NT 4.0 Workstation
 - Microsoft Windows NT 4.0 Server
 - Microsoft Windows NT 4.0 Server, Enterprise Edition
 - Microsoft Windows NT 4.0 Server, Terminal Server Edition

NOTE: Windows 2000 is not affected by this vulnerability.

Patch Availability
==================
 - Intel: http://www.microsoft.com/downloads/release.asp?ReleaseID=19172
 - Alpha: http://www.microsoft.com/downloads/release.asp?ReleaseID=19173

More Information
================
Please see the following references for more information related to this
issue.
 - Microsoft Security Bulletin MS00-008: Frequently Asked Questions,
   http://www.microsoft.com/technet/security/bulletin/fq00-008.asp.
 - Microsoft Security Bulletin MS99-025,
   Unauthorized Access to IIS Servers through ODBC Data Access with RDS,
   http://www.microsoft.com/security/bulletins/ms99-025.asp.
 - Microsoft Knowledge Base (KB) article Q103861,
   INFO: Choosing the Debugger That the System Will Spawn,
   http://www.microsoft.com/technet/support/kb.asp?ID=103861.
 - Microsoft Knowledge Base (KB) article Q185590,
   Guide To Windows NT 4.0 Profiles and Policies (Part 5 of 6),
   http://www.microsoft.com/technet/support/kb.asp?ID=185590.
 - Microsoft Knowledge Base (KB) article Q184375,
   Security Implications of RDS 1.5, IIS 3.0 or 4.0, and ODBC,
   http://www.microsoft.com/technet/support/kb.asp?ID=184375.
 - Microsoft Knowledge Base (KB) article Q184375,
   HOWTO: Regulate Network Access to the Windows NT Registry,
   http://www.microsoft.com/technet/support/kb.asp?ID=155363.
 - 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
Technical Support is available at
http://support.microsoft.com/support/contact/default.asp.

Revisions
=========
 - March 09, 2000: Bulletin Created.

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Last updated Thursday, March 09, 2000

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

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