DOCUMENT:Q260069 08-MAY-2002 [iis] TITLE :Malformed HTR Request Returns Source Code for ASP Scripting File PRODUCT :Internet Information Server PROD/VER::4.0,5.0 OPER/SYS: KEYWORDS:kbWinNT400PreSP7Fix kbWin2000PreSP2Fix kbWin2000SP2Fix kbgraphxlinkcritical ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Services version 5.0 - Microsoft Internet Information Server version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== A malformed HTR request may cause the source code of the Active Server Pages (ASP) script file to be returned. CAUSE ===== The problem occurs because the CreateFile function that is used to open requested files deletes all of the trailing spaces in a file name. The file-name truncation in the CreateFile function causes the two names "C:\Ineptub\Wwroot\Default.asp" and "C:\Ineptub\Wwroot\Default.asp" to be the same, which causes the source code of the Default.asp file to be opened and be returned. 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 Windows 2000: The following file is available for download from the Microsoft Download Center: DownloadDownload Q267559_w2k_sp2_x86_en.exe now (http://www.microsoft.com/Downloads/Release.asp?ReleaseID=22708) 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. For additional information about what this package fixes, click the article numbers below to view the articles in the Microsoft Knowledge Base: Q267560 Changing the URL in a Specific Manner May Expose Contents of a File Q267559 GET on .Htr File Can Cause a "Denial of Service" or Enable Directory Browsing Q260838 IIS Stops Servicing .htr Requests The English version of this fix should have the following file attributes or later: Date Time Version Size File name ----------------------------------------------------- 07/07/2000 03:17p 5.00.2195.2100 46,352 Ism.dll Windows NT 4.0 A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The following files are available for download from the Microsoft Download Center: x86: DownloadDownload Htrdos4i.exe now (http://www.microsoft.com/Downloads/Release.asp?ReleaseID=22709) x86 Symbols: DownloadDownload Htrdos4is.exe now (http://www.microsoft.com/Downloads/Release.asp?ReleaseID=22709) Alpha: DownloadDownload Htrdos4a.exe now (http://www.microsoft.com/Downloads/Release.asp?ReleaseID=22709) Alpha Symbols: DownloadDownload Htrdos4as.exe now (http://www.microsoft.com/Downloads/Release.asp?ReleaseID=22709) 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. For additional information about what this package fixes, click the article numbers below to view the articles in the Microsoft Knowledge Base: Q267560 Changing the URL in a Specific Manner May Expose Contents of a File Q267559 GET on .Htr File Can Cause a "Denial of Service" or Enable Directory Browsing Q260838 IIS Stops Servicing .htr Requests The English version of this fix should have the following file attributes or later: Date Time Version Size File name Platform ---------------------------------------------------------- 06/28/2000 09:34p 4.2.748.1 54,544 Ism.dll x86 06/28/2000 09:30p 4.02.0748 84,752 Ism.dll Alpha STATUS ====== This problem was first corrected in Windows 2000 Service Pack 2. Internet Information Services 5.0 --------------------------------- Microsoft has confirmed this to be a problem in Internet Information Services 5.0. Internet Information Server 4.0 ------------------------------- Microsoft has confirmed this to be a problem in Internet Information Server 4.0. MORE INFORMATION ================ For related information about this problem, please visit the following Microsoft Web site: http://www.microsoft.com/technet/security/bulletin/ms00-031.asp For additional security-related information about Microsoft products, please visit the following Microsoft Web site: http://www.microsoft.com/security/ For additional information about other issues that are resolved by this update, click the article number below to view the article in the Microsoft Knowledge Base: Q260838 IIS Stops Servicing .htr Requests For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base: Q249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes Additional query words: ====================================================================== Keywords : kbWinNT400PreSP7Fix kbWin2000PreSP2Fix 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.