Earlier this week, a security vulnerability was disclosed in OpenSSL, one of the software libraries that Apache CloudStack uses to encrypt data sent over network network connections. As the vulnerability has existed in OpenSSL since early 2012, System VMs in Apache CloudStack versions 4.0.0-incubating-4.3 are running software using vulnerable versions of OpenSSL. This includes CloudStack's Virtual Router VMs, Console Proxy VMs, and Secondary Storage VMs.
We are actively working on creating updated System VM templates for each recent version of Apache CloudStack, and for each of the hypervisor platforms which Apache CloudStack supports. Due to our testing and QA processes, this will take several days. In the meantime, we want to provide our users with a temporary workaround for currently running System VMs.