The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades. http://secunia.com/advisories/37649/ http://www.sektioneins.de/de/advisories/advisory-032009-piwik-cookie-unserialize-vulnerability/index.html http://piwik.org/blog/2009/12/piwik-response-to-shocking-news-in-php-exploitation/ http://www.vuxml.org/freebsd/fcbf56dd-e667-11de-920a-00248c9b4be7.html

The following package is affected: piwik