The National Security Agency (NSA) and CISA have updated their joint
Cybersecurity Technical Report (CTR): Kubernetes Hardening Guide,
originally released in August 2021, based on valuable feedback and inputs from
the cybersecurity community.
Kubernetes is an open-source system that automates deployment, scaling, and
management of applications run in containers. A container is a runtime
environment that contains a software package and its dependencies. Kubernetes
is often hosted in a cloud environment. The CTR provides recommended
configuration and hardening guidance for setting up and securing a Kubernetes
CISA encourages users and administrators to review the updated Kubernetes
Hardening Guide—which includes additional detail and explanations—and apply
the hardening measures and mitigations to manage associated risks.