A major security vulnerability has been discovered in the GNU Bash (Bourne Again Shell) for the Linux operating system. System administrators running Red Hat Enterprise , Fedora, CentOS, Ubuntu, and Debian distributions will want to update to the latest release of the Bash package. This vulnerability affects Bash versions 1.14 – 4.3 which is even included in the 10.9.4 releases of the Apple OS X operating system also known as Mavericks. Even if you are running another distribution of Linux such as Mint or Zorin this does not exclude you from being affected by this vulnerability. Forks of Red Hat and Debian based distributions will very likely be running Bash and need to be patched.