F5'shellshocked with Bash

I check in my F5 with command: env x='() { :;}; echo vulnerable' bash -c 'echo this is a test' and I receive result: vulnerable this is a test Thus, my system is vulnerable.

 

I read links: https://devcentral.f5.com/articles/shellshock-mitigation-with-big-ip-irules But, i read links: https://support.f5.com/kb/en-us/solutions/public/15000/600/sol15629.html I want to know this link is solving this problem bash vulnerability? Pls guide me to solve this problem bash vulnerability.