The remote host is missing an update to nagios announced via advisory USN-698-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: nagios-common 2:1.3-cvs.20050402-8ubuntu8 After a standard system upgrade you need to restart Nagios to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-698-1

It was discovered that Nagios did not properly parse commands submitted using the web interface. An authenticated user could use a custom form or a browser addon to bypass security restrictions and submit unauthorized commands.