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. --------------------------------------------------------------------- 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 Thursday, March 09, 2000 (c) 2000 Microsoft Corporation. All rights reserved. Terms of use. ******************************************************************* You have received this e-mail bulletin as a result of your registration to the Microsoft Product Security Notification Service. You may unsubscribe from this e-mail notification service at any time by sending an e-mail to MICROSOFT_SECURITY-SIGNOFF-REQUEST@ANNOUNCE.MICROSOFT.COM The subject line and message body are not used in processing the request, and can be anything you like. For more information on the Microsoft Security Notification Service please visit http://www.microsoft.com/security/services/bulletin.asp. For security-related information about Microsoft products, please visit the Microsoft Security Advisor web site at http://www.microsoft.com/security.