-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The text of this announcment is also available at http://www.madirish.net/?article=440 Description of Vulnerability: - - - ----------------------------- Drupal (http://drupal.org) is a robust content management system (CMS) written in PHP and MySQL that provides extensibility through various third party modules. The Sections module (http://drupal.org/project/sections) "allows you to create sections within your site. Each section has an installed template, theme or style attached to it." The Sections module contains a cross site scripting vulnerability because it does not properly sanitize output of section names before display. Systems affected: - - - ----------------- Drupal 6.14 with Sections 6.x-1.2 was tested and shown to be vulnerable. Impact: - - - ------- XSS vulnerabilities may expose site administrative accounts to compromise which could lead to web server process compromise. Mitigating factors: - - - ------------------- The Sections module must be installed. To carry out a Sections based XSS proof of concept exploit below the attacker must have 'administer sections' permissions. Proof of Concept: - - --------------------- 1. Install Drupal 6.14 2. Install Sections 6.x-1.2 3. Enable the Sections module from Administer -> Site building -> Modules 4. Click Administer -> Site building -> Sections 5. Click the 'Add section' button 5. Enter "<script>alert('xss');</script>" in the 'Name' text area 6. Click the 'Add section' button to save the section and observe the rendered JavaScript 7. Click on the 'Sections' link in the navigation to observe the rendered JavaScript Technical details: - - ------------------------ The Sections module fails to sanitize the output of the section name before display. Applying the following patch fixes this vulnerability. Patch - - ------- Applying the following patch mitigates these threats. - --- sections/sections.admin.inc 2008-06-01 08:51:51.000000000 -0400 +++ sections.fixed/sections.admin.inc 2009-11-06 15:43:53.997416137 -0500 @@ -234,6 +234,7 @@ function theme_sections_admin_display_fo foreach (element_children($form['sections']) as $key => $id) { // Don't take form control structures. if (is_array($form['sections'][$id]['name'])) { + $form['sections'][$id]['name']['#value'] = filter_xss($form['sections'][$id]['name']['#value']); $form['sections'][$id]['weight']['#attributes']['class'] = 'sections-order-weight'; $rows[] = array( 'data' => array( Vendor Response - --------------- Upgrade to the latest version. SA-CONTRIB-2009-112 http://drupal.org/node/661404 - -- Justin C. Klein Keane http://www.MadIrish.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/ iPwEAQECAAYFAkspHlIACgkQkSlsbLsN1gCrwQcAkrdlC1Xp5oRqNE2sAw2oCo62 RFQkd9v1RoVLQTNdJVlvo/VdLpl18e216CeCd1Is0Uzk8/qegNLplyVF2rgQRnP1 jgcdSqu/gNUx22kWdxlIPuc9AreeuDpzaokyqXQLf0JZdhfjZopg2xaNZJ6ur73D wO6RgjOT63/u+lH/gahJmJyvtR32Yc3phnbTcMPbqznxuNID7/9ZlY+SCat2GcOM A7fzzAwOX232lnaWuvk8wuolCtgA6VHzFXDjj+TNQvv/FXNkaqimZ8fIVnCfsbWu erD9ZccCP4lTpTzd51I= =Tpdx -----END PGP SIGNATURE-----