---------------------- Forwarded by Patrick MANNION/us/socgen on 07/06/99 04:03 PM --------------------------- Microsoft Product Security <secnotifat_private> on 07/06/99 03:01:55 PM To: MICROSOFT_SECURITYat_private cc: (bcc: Patrick MANNION/us/socgen) Subject: Microsoft Security Bulletin (MS99-024) The following is a Security Bulletin from the Microsoft Product Security Notification Service. Please do not reply to this message, as it was sent from an unattended mailbox. ******************************** Microsoft Security Bulletin (MS99-024) -------------------------------------- Patch Available for "Unprotected IOCTLs" Vulnerability Originally Posted: July 06, 1999 Summary ======= Microsoft has released a patch that eliminates a vulnerability that could allow denial of service attacks against a Microsoft(r) Windows NT(r) workstation, server or terminal server. An unprivileged program can disable the local mouse or keyboard on a server or workstation, and disable the console mouse or keyboard on a terminal server. Frequently asked questions regarding this vulnerability can be found at http://www.microsoft.com/security/bulletins/MS99-024faq.asp Issue ===== The IOCTLs that are used to obtain services from the keyboard and mouse drivers in Windows NT do not require that the calling program have administrative privileges. A user-level program could use legitimate calls to disable the mouse and keyboard, after which the machine would need to be rebooted to restore normal service. On a terminal server, such a program could disable the keyboard and mouse on the console. Affected Software Versions ========================== - Microsoft Windows NT Workstation 4.0 - Microsoft Windows NT Server 4.0 - Microsoft Windows NT Server 4.0, Enterprise Edition - Microsoft Windows NT Server 4.0, Terminal Server Edition Patch Availability ================== - Windows NT Server and Workstation 4.0: ftp://ftp.microsoft.com/bussys/winnt/winnt-public/ fixes/usa/nt40/Hotfixes-PostSP5/IOCTL-fix/ - Windows NT Server 4.0, Terminal Server Edition: ftp://ftp.microsoft.com/bussys/winnt/winnt-public/ fixes/usa/nt40tse/Hotfixes-PostSP4/IOCTL-fix/ NOTE: Line breaks have added to the above URLs for readability More Information ================ Please see the following references for more information related to this issue. - Microsoft Security Bulletin MS99-024: Frequently Asked Questions, http://www.microsoft.com/security/bulletins/MS99-024faq.asp. - Microsoft Knowledge Base (KB) article Q236359, Denial of Service Attack Using Unprotected IOCTL Function Call, http://support.microsoft.com/support/kb/articles/q236/3/59.asp. (Note: It may take 24 hours from the original posting of this bulletin for the KB article to be visible; however, a copy will be immediately available in the patch folder.) - Microsoft Security Advisor web site, http://www.microsoft.com/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. Acknowledgments =============== Microsoft acknowledges Mark Russinovich of Systems Internals (http://www.sysinternals.com) for discovering this vulnerability and reporting it to us. Revisions ========= - July 06, 1999: 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. (c) 1999 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-REQUESTat_private 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.
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