The remote host is missing an update to webcalendar announced via advisory DSA 1267-1. It was discovered that WebCalendar, a PHP-based calendar application, insufficiently protects an internal variable, which allows remote file inclusion.

For the stable distribution (sarge) this problem has been fixed in version 0.9.45-4sarge6. The upcoming stable distribution (etch) no longer contains webcalendar packages. For the unstable distribution (sid) this problem will be fixed soon. We recommend that you upgrade your webcalendar package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201267-1