DOCUMENT:Q264684 15-MAY-2002 [winnt] TITLE :MS00-040: Patch for "Remote Registry Access Authentication" Vuln PRODUCT :Microsoft Windows NT PROD/VER::4.0 OPER/SYS: KEYWORDS:kbSecurity kbWinNT400PreSP7Fix kbgraphxlinkcritical KbSECVulnerability KbSECBulletin ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft Windows NT Workstation version 4.0 - Microsoft Windows NT Server version 4.0, Terminal Server Edition - Microsoft Windows NT Server, Enterprise Edition version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== Microsoft has released a patch that eliminates a security vulnerability in Microsoft Windows NT 4.0. This vulnerability can allow access to the registry from a remote computer. The remote computer must be authenticated by a remote registry server before it can be processed. If a request is malformed in a specific fashion, the request is misinterpreted by the remote registry server, causing it not to work. Because the remote registry server runs within the Winlogon.exe system process in Windows NT 4.0, a problem in that process causes problems with the entire system. Only an authenticated user can run such a request. An anonymous (or null-session) connection cannot cause this problem. You can place an affected computer back in service by rebooting the computer. RESOLUTION ========== Windows NT 4.0 -------------- To resolve this problem, obtain the individual package referenced below or obtain the Windows NT 4.0 Security Rollup Package. For additional information on the SRP, click the article number below to view the article in the Microsoft Knowledge Base: Q299444 Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP) The following file is available for download from the Microsoft Download Center: x86: DownloadDownload Q264684i.exe now (http://www.microsoft.com/Downloads/Release.asp?ReleaseID=23077) For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. After it is posted, the file is housed on secure servers that prevent any unauthorized changes to the file. The English version of this fix should have the following file attributes or later: Date Time Size File name Platform --------------------------------------------------- 06/07/2000 09:20p 343,312 Rpcrt4.dll x86 06/07/2000 09:20p 192,784 Winlogon.exe x86 06/07/2000 09:19p 602,384 Rpcrt4.dll Alpha 06/07/2000 09:19p 275,216 Winlogon.exe Alpha Microsoft Windows NT Server version 4.0, Terminal Server Edition ---------------------------------------------------------------- To resolve this problem, obtain the Windows NT Server 4.0, Terminal Server Edition, Security Rollup Package (SRP). For additional information about the SRP, click the article number below to view the article in the Microsoft Knowledge Base: Q317636 Windows NT Server 4.0, Terminal Server Edition, Security Rollup Package STATUS ====== Microsoft has confirmed that this problem could result in some degree of security vulnerability in Windows NT 4.0 and Windows NT Server version 4.0, Terminal Server Edition. MORE INFORMATION ================ For additional information about this issue, visit the following Microsoft Web site: http://www.microsoft.com/technet/security/bulletin/ms00-040.asp Additional query words: security_patch kbtsesrp ====================================================================== Keywords : kbSecurity kbWinNT400PreSP7Fix kbgraphxlinkcritical KbSECVulnerability KbSECBulletin Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400 kbNTTermServ400 kbNTTermServSearch Version : :4.0 Hardware : x86 Issue type : kbbug Solution Type : kbfix ============================================================================= 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. Copyright Microsoft Corporation 2002.