Re: MS-DOS Filename/Directory Vulnerability

[Seth Arnold <sarnold () wirex com>]

On Thu, Aug 16, 2001 at 07:08:16PM -0700, Felipe Moniz wrote:
> I tested this in the PWS (based on IIS 4) and it worked.
>
> I created a file called "clientlist2001.txt" and with client~1.txt
> (www.site.com/client~1.txt) I get the clientlist2001.txt without know the
> complete name of the file. The problem occurs also when I type
> "postin~1.htm" for access "postinfo.html" file.

This is a known problem. There is a switch that can be thrown somewhere
(possibly only in the registry, but I thought I have seen a checkbox for
this somewhere...) that does not generate the MSDOS names on NTFS
partitions.

Microsoft has written a guide to securing WinNT; I bet they have updated
it for Win2k as well. They detail how to turn off the MSDOS filename
support in that document.

Cheers!