Summary
The remote host is missing an update to the system as announced in the referenced advisory.
Solution
Update your system with the appropriate patches or software upgrades.
http://developer.joomla.org/security/news/470-20120601-core-privilege-escalation.html http://www.vuxml.org/freebsd/f46c4c6a-ba25-11e1-806a-001143cd36d8.html
Insight
The following package is affected: joomla