Shellshock, or the Bash Bug, is a security flaw that has been infecting countless devices and servers all over the world. Bash is a Unix shell released in 1989 that was created to replace the Bourne shell. Bash can be present in the MAC OSX and almost all Linux and Unix operating systems and may allow third parties to carry out commands lacking authentication, which makes it possible for these people to assume the control of the affected operating system, collect sensitive data and more. Shellshock is a high-level threat that may be as harmful as the infamous Heartbleed. Any networked device and apps that utilize Bash such as Web CGI programs, IP cameras, gateways and routers are vulnerable to attacks from Shellshock. If Bash scripts are conducted via cgi-bin, the Shellshock's attacks may become more complicated. Computer users should be very attentive and watch out for a vulnerability to Shellshock.