I've updated my systems to the latest versions of bash (Fedora: bash-4.2.48-2.fc19.x86_64 and CentOS: bash-4.1.2-15.el6_5.2.x86_64)Is merely updating enough to avoid the exploit or do I need to then close all terminals, restart all services, or restart the systems?
Do I have to reboot after updating bash to avoid shellshock?
bash;upgrade;shellshock
From RedHat FAQ:  (vulnerability CVE-2014-6271 in Bash.)Do I need to reboot or restart services after installing this update?No, once the new bash package is installed, you do not need to reboot  or restart any services. This issue only affects the Bash shell during  startup, not already running shells. Upgrading the package will ensure  all new shells that are started are using the fixed version.