From secnotif@MICROSOFT.COM Mon Sep 4 02:32:13 2000 From: Microsoft Product Security Resent-From: mea culpa To: MICROSOFT_SECURITY@ANNOUNCE.MICROSOFT.COM Resent-To: jericho@attrition.org Date: Mon, 28 Aug 2000 13:10:01 -0700 Subject: Microsoft Security Bulletin (MS00-062) 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. ******************************** -----BEGIN PGP SIGNED MESSAGE----- Microsoft Security Bulletin (MS00-062) - -------------------------------------- Patch Available for "Local Security Policy Corruption" Vulnerability Originally posted: August 28, 2000 Summary ======= Microsoft has released a patch that eliminates a security vulnerability in Microsoft(r) Windows(r) 2000. The vulnerability could allow a malicious user to disrupt normal operation of an affected machine, and potentially of an entire network. Customers who have applied Windows 2000 Service Pack 1 are already protected against the vulnerability and do not need to take any further action. Frequently asked questions regarding this vulnerability and the patch can be found at http://www.microsoft.com/technet/security/bulletin/fq00-062.asp Issue ===== This vulnerability could allow a malicious user to corrupt parts of a Windows 2000 system's local security policy, with the effect of disrupting domain membership and trust relationship information. If a workstation or member server were attacked via this vulnerability, it would effectively remove the machine from the domain; if a domain controller were attacked, it could no longer process domain logon requests. Recovering from such an attack would likely require that a known-working configuration be restored from backup. It would not be necessary to be an authenticated domain member in order to mount an attack via this vulnerability. Any user who could establish a RPC connection with an affected machine and send the proper command sequence to it could exploit the vulnerability. If the malicious user were an intranet user, he could likely attack any machine within the network; if the malicious user were on the Internet, he could likely attack only machines on the network edge that allow RPC connections. The vulnerability was discovered by an internal security team at Microsoft, and, to the best of our knowledge, it is not known "in the wild". Nevertheless, because of the serious consequences of the vulnerability, Microsoft encourages all Windows 2000 users to either apply the patch or Windows 2000 Service Pack 1 immediately. Affected Software Versions ========================== - Microsoft Windows 2000 Professional - Microsoft Windows 2000 Server - Microsoft Windows 2000 Advanced Server Note: Microsoft Windows 2000 Datacenter Server is not affected by this vulnerability. Patch Availability ================== - http://www.microsoft.com/Downloads/Release.asp?ReleaseID=24019 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 MS00-062, http://www.microsoft.com/technet/security/bulletin/fq00-062.asp - Microsoft Knowledge Base article Q269609 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. Revisions ========= - August 28, 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 August 28, 2000 (c) 2000 Microsoft Corporation. All rights reserved. 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