The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
WordPress Plugin Easy Modal 2.0.17 SQL InjectionDefenseCode ThunderScan SAST Advisory
WordPress Easy Modal Plugin
Multiple Security Vulnerabilities
Advisory ID: DC-2017-01-007
Advisory Title: WordPress Easy Modal Plugin Multiple Vulnerabilities
Advisory URL: http://www.defensecode.com/advisories.php
Software: WordPress Easy Modal plugin
Language: PHP
Version: 2.0.17 and below
Vendor Status: Vendor contacted, update released
Release Date: 2017/08/07
Risk: Medium
1. General Overview
===================
During the security audit of Easy Modal plugin for WordPress CMS,
multiple vulnerabilities were discovered using DefenseCode ThunderScan
application source code security analysis platform.
More information about ThunderScan is available at URL:
http://www.defensecode.com
2. Software Overview
====================
According to the plugin developers, Easy Modal is the #1 WordPress
Popup Plugin. It's advertised as "Make glorious & powerful popups and
market your content like never before - all in minutes!".
According to wordpress.org, it has more than 20,000 active installs.
Homepage:
http://wordpress.org/extend/plugins/easy-modal/
https://easy-modal.com
3. Vulnerability Description
============================
During the security analysis, ThunderScan discovered SQL injection
vulnerabilities in Easy Modal WordPress plugin.
The easiest way to reproduce the vulnerability is to visit the
provided URL while being logged in as administrator or another user
that is authorized to access the plugin settings page. Users that do
not have full administrative privileges could abuse the database
access the vulnerability provides to either escalate their privileges
or obtain and modify database contents they were not supposed to be
able to.
The nonce token is required as the URL parameter. Token value is not
unique for each request, nor per each URL, so if the attacker manages
to obtain a valid token value, the module could be exposed to attack
vectors such as Cross Site request forgery (CSRF).
3.1. SQL injection
Function: $wpdb->query()
Variables: $_GET['id'], $_GET['ids'], $_GET['modal']
Sample URL:
http://vulnerablesite.com/wp-admin/admin.php?page=easy-modal&action=dele
te&id%5B0%5D=4%20AND%20SLEEP(5)&easy-modal_nonce=xxx
File: easy-modal\classes\controller\admin\modals.php
---------
93 $ids = is_array($_GET['id']) ? $_GET['id'] :
array($_GET['id']);
...
97 $ids = $_GET['ids'];
...
101 $ids = $_GET['modal'];
...
110 $wpdb->query("UPDATE {$wpdb->prefix}em_modals SET
is_trash = 1 WHERE id IN (".implode(',', $ids).")");
---------
3.2. SQL injection
Function: $wpdb->query()
Variables: $_GET['id'], $_GET['ids'], $_GET['modal']
Sample URL:
http://vulnerablesite.com/wp-admin/admin.php?easy-modal_nonce=xxx&_wp_ht
tp_referer=%2Fvulnerablesite.com%2Fwp-admin%2Fadmin.php%3Fpage%3Deasy-mo
dal%26status%3Dtrash&page=easy-modal&action=untrash&paged=1&id[]=2)%20AN
D%20SLEEP(10)--%20ZpVQ&action2=-1
File: easy-modal\classes\controller\admin\modals.php
---------
123 $ids = is_array($_GET['id']) ? $_GET['id'] :
array($_GET['id']);
...
127 $ids = $_GET['ids'];
...
131 $ids = $_GET['modal'];
...
140 $wpdb->query("UPDATE {$wpdb->prefix}em_modals SET
is_trash = 0 WHERE id IN ($ids)");
---------
4. Solution
===========
Vendor resolved the security issues after we reported the
vulnerability. All users are strongly advised to update WordPress Easy
Modal plugin to the latest available version.
5. Credits
==========
Discovered with DefenseCode ThunderScan source code security analyzer
by Neven Biruski.
6. Disclosure Timeline
======================
2017/04/04 Vendor contacted
2017/04/06 Vendor responded
2017/04/13 Update released
2017/08/07 Advisory released to the public
7. About DefenseCode
====================
DefenseCode L.L.C. delivers products and services designed to analyze
and test web, desktop and mobile applications for security
vulnerabilities.
DefenseCode ThunderScan is a SAST (Static Application Security
Testing, WhiteBox Testing) solution for performing extensive security
audits of application source code. ThunderScan SAST performs fast and
accurate analyses of large and complex source code projects delivering
precise results and low false positive rate.
DefenseCode WebScanner is a DAST (Dynamic Application Security
Testing, BlackBox Testing) solution for comprehensive security audits
of active web applications. WebScanner will test a website's security
by carrying out a large number of attacks using the most advanced
techniques, just as a real attacker would.
Subscribe for free software trial on our website
http://www.defensecode.com/ .
E-mail: defensecode[at]defensecode.com
Website: http://www.defensecode.com
Twitter: https://twitter.com/DefenseCode/
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