DOCUMENT:Q246045 08-MAY-2002 [winnt] TITLE :RFPoison: Denial of Service Attack Causes Access Violation PRODUCT :Microsoft Windows NT PROD/VER::4.0 OPER/SYS: KEYWORDS:kberrmsg kbSecurity kbWinNT400PreSP7Fix kbgraphxlinkcritical ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0, Terminal Server Edition - Microsoft Windows NT Server version 4.0 - Microsoft Windows NT Workstation version 4.0 - Microsoft Windows NT Server, Enterprise Edition version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== Windows NT clients are unable to gain access to shared file resources or make other named pipe connections to a Windows NT-based server or workstation after the following error message is generated by the Dr. Watson utility: Access violation c0000005 in Services.exe CAUSE ===== This behavior occurs because a malformed packet causes Srvsvc.dll to reference an invalid memory location. 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 files are available for download from the Microsoft Download Center: Intel: DownloadDownload Q246045.exe now (http://www.microsoft.com/Downloads/Release.asp?ReleaseID=16382) Alpha: DownloadDownload Q246045.exe now (http://www.microsoft.com/Downloads/Release.asp?ReleaseID=16383) 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-language version of this fix should have the following file attributes or later: Date Time Size File name Platform -------------------------------------------------------------- 11/22/1999 10:59a 146,704 Srvsvc.dll Alpha 11/22/1999 10:59a 99,600 Srvsvc.dll i386 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 ====== Windows NT Server or Workstation 4.0 ------------------------------------ Microsoft has confirmed this to be a problem in the Microsoft products that are listed at the beginning of this article. Windows NT Server 4.0, Terminal Server Edition ---------------------------------------------- Microsoft has confirmed this to be a problem in the Microsoft products that are listed at the beginning of this article. MORE INFORMATION ================ For more information on this vulnerability, see the following Microsoft Web site: http://www.microsoft.com/technet/security/bulletin/ms99-055.asp If you suspect that an RFPoison attack has occurred and your Dr. Watson information is consistent with the attack, an analysis of the User.dmp log file may confirm the attack. The User.dmp file is created in the %SystemRoot% folder when Services.exe stops working if the Create Crash Dump File check box is selected in Drwtsn32.exe. Additional query words: security_patch RFPoison ====================================================================== Keywords : kberrmsg kbSecurity kbWinNT400PreSP7Fix kbgraphxlinkcritical Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400 kbNTTermServ400 kbNTTermServSearch Version : :4.0 Hardware : ALPHA 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.