CVE-2012-2667
Session fixation vulnerability in lib/user/sfBasicSecurityUser.class.php in SensioLabs Symfony before 1.4.18 allows remote attackers to hijack web sessions via vectors related to the regenerate method and unspecified "database backed session classes."
Date published : 2012-06-07
http://www.securityfocus.com/bid/53776
http://symfony.com/blog/security-release-symfony-1-4-18-released