-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Vulnerability Report Author: Justin C. Klein Keane <justin@madirish.net> Reported: 19 Feb, 2014 Description of Vulnerability: - ----------------------------- Drupal (http://drupal.org) is a robust content management system (CMS) written in PHP and MySQL. The Custom Search module "alters the default search box in many ways. If you need to have options available like in advanced search, but directly in the search box, this module is for you." The Drupal Custom Search module (https://drupal.org/project/custom_search) contains a persistent cross site scripting (XSS) vulnerability due to the fact that it fails to sanitize filter labels before display. Systems affected: - ----------------- Drupal 7.26 with Custom Search 7.x-1.13 was tested and shown to be vulnerable Impact - ------ Users can inject arbitrary HTML (including JavaScript) in order to attack site users, including administrative users. This could lead to account compromise, which could in turn lead to web server compromise, or expose administrative users to client side malware attacks. Mitigating factors: - ------------------- In order to inject arbitrary script malicious users must have the ability "administer custom search." Proof of Concept Exploits: - ----------------- 1. Install and enable the Custom Search module 2. Navigate the Custom Search configuration at ?q=admin/config/search/custom_search/results 3. Change the 'Position' drop down to 'Above results' 4. Enter "<script>alert('xss');</script>" in the 'Label text' input field 5. Click the 'Save Configuration' button 6. Submit any search to view the JavaScript on the results page. Vendor response: - ---------------- Vulnerability is fixed in the latest versions of the Custom Search module (ref https://drupal.org/node/2231665) - -- Justin C. Klein Keane http://www.MadIrish.net The digital signature on this e-mail may be verified using the public key at http://www.madirish.net/gpgkey -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.22 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iPwEAQECAAYFAlM8n/8ACgkQkSlsbLsN1gAGXwb9FaDO4jn6RBhqOqLkvFPu3eJE Ae+E5BEAxJ8wQpZx2dnen5hizNtN0q2o6LkDffwkEaOjZMJZIum23F8ovnxciuiA B/vg4ZfKav+08Ac8ZJcC5FwKbz0hs6mlMR5aLGQK28PjLShEEtMUEzlfDzhAA1GK 3I3huJIUCszR5nkgYGjvxrHmCVHMEZ9f0hS5L6tfEaLKCSFtyVbM65CfdGcFnrr0 o2+YQd9NQ8NnLYe+wB2VGXgydBseQ8AdshnB6c1WTG7/lHHVqOV2f8vbr4kewoCz PQln6M5j/UJtaMyMmds= =Sqil -----END PGP SIGNATURE-----