metasploit-framework/modules/auxiliary/scanner/sap/sap_icm_urlscan.rb

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

require 'rex/proto/http'
require 'msf/core'

class Metasploit3 < Msf::Auxiliary

  include Msf::Exploit::Remote::HttpClient
  include Msf::Auxiliary::Scanner
  include Msf::Auxiliary::Report

  def initialize(info = {})
    super(update_info(info,
      'Name'            => 'SAP URL Scanner',
      'Description'   => %q{
        This module scans for commonly found SAP Internet Communication Manager URLs
        and outputs return codes for the user.
      },
      'Author'          => [ 'Chris John Riley' ],
      'References'      =>
        [
          [ 'CVE', '2010-0738' ] # VERB auth bypass
        ],
      'License'         => MSF_LICENSE
      ))

    register_options(
      [
        OptString.new('VERB',    [true, "Verb for auth bypass testing", "HEAD"]),
        OptString.new('URLFILE', [true, "SAP ICM Paths File", "sap_icm_paths.txt"])
      ], self.class)
  end

  # Base Structure of module borrowed from jboss_vulnscan
  def run_host(ip)
    # If URLFILE is set empty, obviously the user made a silly mistake
    if datastore['URLFILE'].empty?
      print_error("Please specify a URLFILE")
      return
    end

    # Initialize the actual URLFILE path
    if datastore['URLFILE'] == "sap_icm_paths.txt"
      url_file = "#{Msf::Config.data_directory}/wordlists/#{datastore['URLFILE']}"
    else
      # Not the default sap_icm_paths file
      url_file = datastore['URLFILE']
    end

    # If URLFILE path doesn't exist, no point to continue the rest of the script
    if not File.exists?(url_file)
      print_error("Required URL list #{url_file} was not found")
      return
    end

    res = send_request_cgi(
      {
        'uri'       => "/" + Rex::Text.rand_text_alpha(12),
        'method'    => 'GET',
        'ctype'     => 'text/plain',
      }, 20)

    if res
      print_status("Note: Please note these URLs may or may not be of interest based on server configuration")
      @info = []
      if not res.headers['Server'].nil?
        @info << res.headers['Server']
        print_status("#{rhost}:#{rport} Server responded with the following Server Header: #{@info[0]}")
      else
        print_status("#{rhost}:#{rport} Server responded with a blank or missing Server Header")
      end

      if (res.body and /class="note">(.*)code:(.*)</i.match(res.body) )
        print_error("#{rhost}:#{rport} SAP ICM error message: #{$2}")
      end

      # Load URLs
      urls_to_check = []
      File.open(url_file) do |f|
        f.each_line do |line|
          urls_to_check.push line
        end
      end

      print_status("#{rhost}:#{rport} Beginning URL check")
      urls_to_check.each do |url|
        check_url(url.strip)
      end
    else
      print_error("#{rhost}:#{rport} No response received")
    end

  end

  def check_url(url)
    res = send_request_cgi({
      'uri'       => url,
      'method'    => 'GET',
      'ctype'     => 'text/plain',
    }, 20)

    if (res)
      if not @info.include?(res.headers['Server']) and not res.headers['Server'].nil?
        print_good("New server header seen [#{res.headers['Server']}]")
        @info << res.headers['Server'] #Add To seen server headers
      end

      case
      when res.code == 200
        print_good("#{rhost}:#{rport} #{url} - does not require authentication (200)")
      when res.code == 403
        print_good("#{rhost}:#{rport} #{url} - restricted (403)")
      when res.code == 401
        print_good("#{rhost}:#{rport} #{url} - requires authentication (401): #{res.headers['WWW-Authenticate']}")
        # Attempt verb tampering bypass
        bypass_auth(url)
      when res.code == 404
        # Do not return by default, only display in verbose mode
        vprint_status("#{rhost}:#{rport} #{url.strip} - not found (404)")
      when res.code == 500
        print_good("#{rhost}:#{rport} #{url} - produced a server error (500)")
      when res.code == 301, res.code == 302
        print_good("#{rhost}:#{rport} #{url} - redirected (#{res.code}) to #{res.headers['Location']} (not following)")
      else
        vprint_status("#{rhost}:#{rport} - unhandle response code #{res.code}")
      end

    else
      print_status("#{rhost}:#{rport} #{url} - not found (No Repsonse code Received)")
    end
  end

  def bypass_auth(url)
    print_status("#{rhost}:#{rport} Check for verb tampering (#{datastore['VERB']})")

    res = send_request_raw({
      'uri'       => url,
      'method'    => datastore['VERB'],
      'version'   => '1.0' # 1.1 makes the head request wait on timeout for some reason
    }, 20)

    if (res and res.code == 200)
      print_good("#{rhost}:#{rport} Got authentication bypass via HTTP verb tampering")
    else
      print_status("#{rhost}:#{rport} Could not get authentication bypass via HTTP verb tampering")
    end
  end
end