In case you have not heard, there is a vulnerability related to bash that affects all Linux machines. We advise you to update your systems as soon as possible.
If you use CentOS/Fedora you can simply run “yum update bash”
If you are using Ubunuty or Debian, you can run “sudo apt-get update”
Description: Stephane Chazelas discovered that Bash incorrectly handled trailing code in
function definitions. An attacker could use this issue to bypass
environment restrictions, such as SSH forced command environments.