The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
Each application software component usually has its own security considerations that you should take into account independently of those that apply to the operating system. Refer to the security guidelines for each component to determine how best to configure it for the requirements of security at your site.