Two vulnerabilities have been reported in the Ajax Checklist module for Drupal, which can be exploited by malicious users to conduct script insertion and SQL injection attacks.

1) Input passed in the URL to the "save" script is not properly sanitised before being used in SQL queries. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.

Successful exploitation of this vulnerability allows e.g. retrieval of administrator password hashes, but requires valid user credentials with the "update ajax checklists" permission.

2) Input passed to unspecified parameters is not properly sanitised before being stored. This can be exploited to insert arbitrary HTML and script code, which is executed in a user's browser session in context of an affected site when the malicious data is viewed.

Successful exploitation of this vulnerability requires valid user credentials with the permission to create or edit posts and use input formats containing the "ajax_checklist" filter.

The vulnerabilities are reported in version 5.x-1.0.

Solution
Update to version 5.x-1.1.

Provided and/or discovered by
1) Justin C. Klein Keane
2) Heine Deelstra, Drupal security team

Changelog
Further details available to Secunia VIM customers

Original Advisory
DRUPAL-SA-2008-057:
http://drupal.org/node/312968

1) http://lists.grok.org.uk/pipermail/full-disclosure/2008-September/064663.html

Deep Links
Links available to Secunia VIM customers