From Fedora Project Wiki
Fedora Security Advisories and Package Updates
As of 2007-11-20, this page is substituted by *anonymous* access to Fedora Update System
See SecurityBasics#Subscribing_to_Security_Announcement_Services for more options.
These Security Advisories and Package Updates can be installed with the yum update program. Use yum update package-name at the command line.
For more information, refer to Managing Software with yum, available at http://docs.fedoraproject.org/yum/.
For the latest Fedora Package Announcements, refer to https://www.redhat.com/mailman/listinfo/fedora-package-announce