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://www.nongnu.org/mailnotify/sa/mail-notification-SA-04:2.asc http://www.nongnu.org/mailnotify/sa/mail-notification-SA-04:3.asc http://www.vuxml.org/freebsd/3030ae22-1c7f-11d9-81a4-0050fc56d258.html

The following package is affected: mail-notification A remote attacker that is able to hijack a connection between Mail Notification and Gmail or an IMAP server is able to crash the application.