Feeder.co RSS Feeder 5.2 Chrome - Persistent Software Vulnerability
2013-10-26
1119
3.8
Feeder.co (www.feeder.co) is the simplest and prettiest way to follow your favorite feeds and sites.
Feeder supports most RSS and Atom feeds on the web. Get a simple overview of your RSS and Atom feeds
in the toolbar. A simple and pretty way of keeping track of your latest RSS and Atom feeds.
The best RSS Feed Reader extension for Chrome.
(Copy of the Vendor Product Homepage: http://feeder.co )
The Vulnerability Laboratory Research Team discovered a persistent web vulnerability in the Feeder.co RSS Feeds Chrome Addon.
2013-10-26: Researcher Notification & Coordination (Ateeq Khan)
Published
Feeder.co
Product: RSS Feeder - Chrome Browser Addon 5.2
Remote
Medium
A remote script code execution vulnerability has been detected in the official feeder.co RSS browser extension application.
The vulnerability allows remote attackers to manipulate via POST method web-application to browser requests (persistent).
The vulnerability affects the main feed input field and since the application is not performing input sanatization properly,
it is possible to inject persistent script code within the affected folder name input field which then directly gets executed
when the victim tries to delete the malicious entry.
It is possible to inject malicious script code in the folder `Name` field parameter of the feeds while adding a new entry.
The code execution happens when a user tries to delete the injected entries. the affected sourcecode with injected payload
is given below for your reference:
<div class=``pui-confirm-text``>Delete ``><iframe onload=``prompt(2)`` src=``http://evolution-sec.com``><script>?</iframe></div>
It is also possible to inject malicious code through remote URL simply by adding new RSS feeds from a third party remote website.
In this case, the ``Title`` parameter is vulnerable.
It is also possible to import/export the RSS feeds through a file which makes this attack vector remotely exploitable through
this method as well.
This vulnerability affects all current feeder.co users who are using the RSS browser extension application for PC. iOS and
Android users may also be affected with this vulnerability.
Successful exploitation of the persistent cross site scripting web vulnerability results in persistent client-side phishing,
persistent client-side unauthorized external redirects and persistent manipulation of the module context.
Vulnerable Module(s):
[+] RSS Feeds
Vulnerable Sections(s):
[+] Add Feed (Title parameter)
[+] Add Folder Name (Name parameter)
The persistent script code execution vulnerability can be exploited by remote attackers without required web-application user account and
with medium user interaction. For demonstration or to reproduce …
To reproduce the proof of concept, the researcher used multiple ways including importing feeds from a remote URL and adding payloads manually.
Including payloads from remote URL:
Adding Payload manually as folder name:
Affected Source Code POC #1: Feed Title
<span>Title</span>
<input type="text" name="title" placeholder="Title…">
#document-fragment
<div>'">>"<script>prompt(1)</script><iframe onload=prompt(3) src=a </iframe> <</div>
<div part="-webkit-input-placeholder" style="visibility: hidden; text-overflow: clip;">Title…</div>
</input>
Affected Source Code POC #2: Folder Name
<span>Name</span>
<input type="text" name="name" placeholder="Name…">
#document-fragment
<div>"><iframe onload=prompt(2) src=http://evolution-sec.com><script></div>
<div part="-webkit-input-placeholder" style="visibility: hidden; text-overflow: clip;">Name…</div>
</input>
Reference(s):
chrome-extension://pnjaodmkngahhkoihejjehlcdlnohgmp/options/options.html?page=undefined&run=undefined&
User input sanitization should be performed on the backend source code in order to bypass all illegal characters and malicious
script code requests for secure parse and to mitigate all further risks associated with this vulnerability.
The security risk of the persistent input validation web vulnerability is estimated as medium(+).
Vulnerability Laboratory [Research Team] - Ateeq Khan ([email protected])
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.
Domains: www.vulnerability-lab.com - www.vuln-lab.com - www.evolution-sec.com
Contact: [email protected] - [email protected] - [email protected]
Section: www.vulnerability-lab.com/dev - forum.vulnerability-db.com - magazine.vulnerability-db.com
Social: twitter.com/#!/vuln_lab - facebook.com/VulnerabilityLab - youtube.com/user/vulnerability0lab
Feeds: vulnerability-lab.com/rss/rss.php - vulnerability-lab.com/rss/rss_upcoming.php - vulnerability-lab.com/rss/rss_news.php
Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory.
Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other
media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and
other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list (feed),
modify, use or edit our material contact ([email protected] or [email protected]) to get a permission.
Copyright © 2013 | Vulnerability Laboratory [Evolution Security]
– VULNERABILITY LABORATORY RESEARCH TEAM DOMAIN: www.vulnerability-lab.com CONTACT: [email protected]