This past week a new bug has been discovered. It has been nicknamed the “Shellshock”. The bug is a glitch within bash in the Unix command shell. Basically, the command line will run a function but after the function is over it can continue to run code.
This is an issue that has gone unnoticed for almost 25 years. There are few issues. if a hacker get to your home computer, can simply run a function and some some malicious code and infect your system. However, if you are using a firewall it is not as big of a concern. Servers though are a little bit different. They are easier to infect since they aren’t protected by firewall and little complex to fix.
Good news is there are many patches already released since the discoverer, so fixing the bug will require a system update.