Files on an FTP Server Can Be Improperly Accessed

ID: Q241407

The information in this article applies to:

Microsoft Internet Information Server version 4.0

SYMPTOMS

After you apply the hotfix referenced in the following Microsoft Knowledge Base article, there is a possibility that files located on a Microsoft FTP server can be viewed and downloaded regardless of NTFS file or folder permissions.

Q237987 FTP GET Does Not Work Correctly on UNC Virtual Directories

RESOLUTION

If the aforementioned hotfix is applied to your IIS 4.0-based computer or if you have applied a hotfix with the version number of 0719 through 0722, it is recommended that you update your system with the security patch mentioned below. A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Windows NT service pack that contains this fix.

To resolve this problem immediately, 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://www.microsoft.com/support/supportnet/overview/overview.asp

The English version of this fix should have the following file attributes or later:


   Date      Time      Size     File name     Platform
   -----------------------------------------------------
   09/16/99   12:40PM   322 KB   Asp.dll        x86
   09/16/99   12:38PM    43 KB   Coadmin.dll    x86
   09/16/99   12:39PM    11 KB   Ftpctrs2.dll   x86
   09/16/99   12:39PM    80 KB   Ftpsvc2.dll    x86
   09/16/99   11:49PM    12 KB   Httpext.h      x86
   09/16/99   12:38PM    18 KB   Iisadmin.dll   x86
   09/16/99   12:38PM    62 KB   Iislog.dll     x86
   09/16/99   12:38PM    17 KB   Infoadmn.dll   x86
   09/16/99   12:38PM   181 KB   Infocomm.dll   x86
   09/16/99   12:38PM    29 KB   Iscomlog.dll   x86
   09/16/99   12:39PM    11 KB   Iwrps.dll      x86
   09/16/99   12:37PM    70 KB   Metadata.dll   x86
   09/16/99   12:38PM    51 KB   Nsepm.dll      x86
   09/16/99   12:39PM    15 KB   W3ctrs.dll     x86
   09/16/99   12:39PM   224 KB   W3svc.dll      x86
   09/16/99   12:38PM    86 KB   Wam.dll        x86

   09/16/99   03:40PM   537 KB   Asp.dll        Alpha
   09/16/99   03:38PM    76 KB   Coadmin.dll    Alpha
   09/16/99   03:39PM    17 KB   Ftpctrs2.dll   Alpha
   09/16/99   03:40PM   124 KB   Ftpsvc2.dll    Alpha
   09/16/99   03:40PM    28 KB   Iisadmin.dll   Alpha
   09/16/99   03:40PM   110 KB   Iislog.dll     Alpha
   09/16/99   03:40PM    26 KB   Infoadmn.dll   Alpha
   09/16/99   03:40PM   181 KB   Infocomm.dll   Alpha
   09/16/99   03:40PM   297 KB   Iscomlog.dll   Alpha
   09/16/99   03:40PM    17 KB   Iwrps.dll      Alpha
   09/16/99   03:40PM   129 KB   Metadata.dll   Alpha
   09/16/99   03:40PM    51 KB   Nsepm.dll      Alpha
   09/16/99   03:40PM    21 KB   W3ctrs.dll     Alpha
   09/16/99   03:40PM   377 KB   W3svc.dll      Alpha
   09/16/99   03:40PM   146 KB   Wam.dll        Alpha

This hotfix has been posted to the following Internet location as Iprftp4i.exe (x86) and Iprftp4a.exe (Alpha):

ftp://ftp.microsoft.com/bussys/iis/iis-public/fixes/usa/IIS40/hotfixes-postSP6/security/IPRFTP-fix/

STATUS

Microsoft has confirmed this to be a problem in Internet Information Server 4.0.

MORE INFORMATION

To view the IIS build number installed on the affected computer, perform the following steps:

Open Windows NT Explorer.

Open the folder where Ftpsvc2.dll is located, <SystemRoot&amp>\System32\Inetsrv.

Right-click Ftpsvc2.dll.

Locate the last four digits of the file version. That number is the build number.

NOTE: The hotfix file version should be 4.02.0724 or higher.

For additional information about how to fix this problem in Internet Information Server version 4.0, click the article number below to view the article in the Microsoft Knowledge Base:

Q242559 Files on an FTP Server Can Be Improperly Accessed

For related information on this problem, please visit the following Microsoft Web site:

http://www.microsoft.com/security/bulletins/ms99-039.asp

For additional security-related information about Microsoft products, please visit the following Microsoft Web site:

http://www.microsoft.com/security/

Additional query words:

Keywords : kbbug4.00 kbfix4.00
Version : winnt:4.0
Platform : winnt
Issue type : kbbug