It is often called the "Shellshocker hack" because it shocked the cybersecurity world: Bash is installed on billions of devices (servers, macOS systems, routers, IoT devices), and the bug had existed for over 25 years. At its core, Bash supports function definitions inside environment variables. For example:
bash --version Vulnerable versions: 1.14 through 4.3 (before patch). Run: shell shocker hack
Shellshock (CVE-2014-6271 and related CVEs) is a critical security vulnerability in Bash (Bourne Again SHell) , a Unix/Linux command-line shell. Discovered in September 2014, it allowed attackers to execute arbitrary commands on a vulnerable system by appending malicious code to environment variables. It is often called the "Shellshocker hack" because