DOCUMENT:Q269862 30-APR-2002 [iis] TITLE :MS00-057: Patch Released for Canonicalization Error Issue PRODUCT :Internet Information Server PROD/VER::4.0,5.0 OPER/SYS: KEYWORDS:kbWinNT400PreSP7Fix kbWin2000SP2Fix kbgraphxlinkcritical ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Server version 4.0 - Microsoft Internet Information Services version 5.0 ------------------------------------------------------------------------------- SYMPTOMS ======== A security patch has been released that resolves a canonicalization error that can allow a malicious user to gain additional permissions to certain types of files that are hosted on a Web server. For this vulnerability to be exploited, several factors are involved: - Only file types that are implemented through ISAPI extensions are affected. It does not affect static Web page or non-Web file types such as .exe, .doc, or .bat. - It only affects servers that expose a Web folder structure that mirrors the physical folder structure on the server. It does not impact virtual directories. - It does not allow arbitrary permissions to be selected, only permissions present on an ancestor folder. - It provides no ability to enumerate the server and locate files that can be affected by the vulnerability. In addition to the above, this security patch also corrects the vulnerability described by the following article in the Microsoft Knowledge Base: Q276489 Patch Available for Web Server Folder Traversal Vulnerability Microsoft Exchange 2000 Server Users and Microsoft SharePoint Portal Server 2001 Users -------------------------------------------------------------------------------------- Both Exchange 2000 and SharePoint Portal Server 2001 have problems with an older verison of this hotfix. A new update for the security patch for these products is available at the following Microsoft Web page: http://www.microsoft.com/technet/security/bulletin/ms00-086.asp RESOLUTION ========== To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, please see the following article in the Microsoft Knowledge Base: Q260910 How to Obtain the Latest Windows 2000 Service Pack Internet Information Services 5.0 --------------------------------- The following file is available for download from the Microsoft Download Center: DownloadDownload Q269862_W2K_SP2_x86_en.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23665) 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 Version Size File name ----------------------------------------------------- 08-09-2000 1:02pm 5.0.2195.2103 357,136 W3svc.dll Internet Information Server 4.0 ------------------------------- The following files are available for download from the Microsoft Download Center: NOTE: Debug symbol files are required by an administrator to do both kernel and user mode debugging, providing a method to resolve global variables and function names in the loaded file. The symbol files are denoted with an "s" in the file name (for example, Prmcan4is.exe). US English: Intel: DownloadDownload Prmcan4i.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23667) Intel Symbols: DownloadDownload Prmcan4is.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23667) Alpha: DownloadDownload Prmcan4a.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23667) Alpha Symbols: DownloadDownload Prmcan4as.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23667) German: Intel: DownloadDownload Prmcan4i.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23673) Intel Symbols: DownloadDownload Prmcan4is.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23673) Alpha: DownloadDownload Prmcan4a.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23673) Alpha Symbols: DownloadDownload Prmcan4as.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23673) Japanese: Intel: DownloadDownload Prmcan4i.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23675) Intel Symbols: DownloadDownload Prmcan4is.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23675) Alpha: DownloadDownload Prmcan4a.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23675) Alpha Symbols: DownloadDownload Prmcan4as.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23675) Korean: Intel: DownloadDownload Prmcan4i.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23676) Intel Symbols: DownloadDownload Prmcan4is.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23676) Alpha: DownloadDownload Prmcan4a.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23676) Alpha Symbols: DownloadDownload Prmcan4as.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23676) Simplified Chinese: Intel: DownloadDownload Prmcan4i.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23672) Intel Symbols: DownloadDownload Prmcan4is.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23672) Alpha: DownloadDownload Prmcan4a.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23672) Alpha Symbols: DownloadDownload Prmcan4as.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23672) Traditional Chinese: Intel: DownloadDownload Prmcan4i.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23677) Intel Symbols: DownloadDownload Prmcan4is.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23677) Alpha: DownloadDownload Prmcan4a.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23677) Alpha Symbols: DownloadDownload Prmcan4as.exe now (http://www.microsoft.com/downloads/release.asp?releaseid=23677) 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 --------------------------------------------------- 08/03/2000 05:06p 330,080 Asp.dll Intel 08/03/2000 05:04p 185,792 Infocomm.dll Intel 08/03/2000 05:05p 38,256 Ssinc.dll Intel 08/03/2000 05:05p 25,360 Sspifilt.dll Intel 08/03/2000 05:05p 228,496 W3svc.dll Intel 08/03/2000 05:08p 551,696 Asp.dll Alpha 08/03/2000 05:06p 304,912 Infocomm.dll Alpha 08/03/2000 05:07p 60,176 Ssinc.dll Alpha 08/03/2000 05:07p 39,696 Sspifilt.dll Alpha 08/03/2000 05:07p 384,272 W3svc.dll 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 this to be a problem in Internet Information Services 5.0 and Internet Information Server 4.0. MORE INFORMATION ================ Additional information about this issue is available from the following Microsoft Web site: http://www.microsoft.com/technet/security/bulletin/ms00-057.asp You can find frequently asked questions about this vulnerability at the following Microsoft Web site: http://www.microsoft.com/technet/security/bulletin/fq00-057.asp Additional query words: security_patch ====================================================================== Keywords : kbWinNT400PreSP7Fix kbWin2000SP2Fix kbgraphxlinkcritical Technology : kbiisSearch kbiis500 kbiis400 Version : :4.0,5.0 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.