CentOS 6.8 was released this week. With a number of security and performance updates, it provides a more stable and secure experience for CentOS 6 users.
The CentOS Project currently is shipping version 7 of its operating system, but older versions all the way back to 5 are still supported. However, as CentOS is based on Red Hat Enterprise Linux (RHEL), it depends on the parent product for many of its important fixes and security patches. Red Hat is winding down support for version 5 and is currently releasing only crucial security patches.
Version 6 is still very active, and the latest release brings a number of bug fixes and updated packages. SSLv3 has been disabled by default. SSL 3 has been considered insecure for some time now, ever since Google released details of the POODLE exploit. There are newer protocols for secure communications which are less risky – you can read more about the issue here. As CentOS is a popular choice for Web servers, disabling SSL 3 is essential.