Criticical BASH vulnerability discovered – update BASH on your CentOS7
[rprasad@vm ~]$ sudo env x='() { :;}; echo vulnerable' bash -c "echo this is a test" //Run following command to check. If it outputs vulnerable then our bash is vulnerable vulnerable this is a test [rprasad@vm ~]$ sudo su - //Become root [root@vm ~]# yum clean all && yum update bash Loaded plugins: fastestmirror Cleaning repos: base extras updates Cleaning up everything Loaded plugins: fastestmirror base | 3.6 kB 00:00 extras ...