This module scans for the Shellshock vulnerability, a flaw in how the Bash shell handles external environment variables. This module targets CGI scripts in the Apache web server by setting the HTTP_USER_AGENT environment variable to a malicious function definition. PROTIP: Use exploit/multi/handler with a PAYLOAD appropriate to your CMD, set ExitOnSession false, run -j, and then run this module to create sessions on vulnerable hosts. Note that this is not the recommended method for obtaining shells. If you require sessions, please use the apache_mod_cgi_bash_env_exec exploit module instead.
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security