Docker is a technology for containerization, while Kubernetes is a tool for orchestrating container deployments. In the subsequent subsections, we will discuss a variety of open-source tools that really are useful for securing Kubernetes cluster...
Kubernetes has quickly become a de facto tool within enterprise software development environments, enabling DevOps engineers to scale large numbers of containers. And recent cybersecurity hardening guidelines laid out by the NSA and CISA indicate that adoption of Kubernetes has reached critical mass. But this surge in adoption also can introduce many new vulnerabilities and misconfigurations which, if left unchecked, could put many organizations at risk.
The NSA - the maker of the original secure Linux (SELinux) - has written guidelines on how to secure video conferencing, text chatting, and collaboration tools; and now explains how to harden Kubernetes against attackers.
Hackers could exploit a Linux kernel bug to escape Kubernetes containers and access critical resources; however, the threat is minimized as any attacker needs to have the specific Linux capability CAP_SYS_ADMIN.
Infrastructure security is important to get right so that attacks can be prevented—or, in the case of a successful attack, damage can be minimized. It is especially important in a Kubernetes environment because, by default, a large number of Kubernetes configurations are not secure. Learn how to secure Kubernetes at the infrastructure level.
While it’s come a long way over the past year, Kubernetes security has not yet reached maturity. But judging from the level of investment in 2021 into technologies for securing Kubernetes — the now-dominant container orchestration platform — enterprises can expect major advancements in the area during the coming year.