Book Image

Learn Kubernetes Security

By : Kaizhe Huang, Pranjal Jumde
5 (1)
Book Image

Learn Kubernetes Security

5 (1)
By: Kaizhe Huang, Pranjal Jumde

Overview of this book

Kubernetes is an open source orchestration platform for managing containerized applications. Despite widespread adoption of the technology, DevOps engineers might be unaware of the pitfalls of containerized environments. With this comprehensive book, you'll learn how to use the different security integrations available on the Kubernetes platform to safeguard your deployments in a variety of scenarios. Learn Kubernetes Security starts by taking you through the Kubernetes architecture and the networking model. You'll then learn about the Kubernetes threat model and get to grips with securing clusters. Throughout the book, you'll cover various security aspects such as authentication, authorization, image scanning, and resource monitoring. As you advance, you'll learn about securing cluster components (the kube-apiserver, CoreDNS, and kubelet) and pods (hardening image, security context, and PodSecurityPolicy). With the help of hands-on examples, you'll also learn how to use open source tools such as Anchore, Prometheus, OPA, and Falco to protect your deployments. By the end of this Kubernetes book, you'll have gained a solid understanding of container security and be able to protect your clusters from cyberattacks and mitigate cybersecurity threats.
Table of Contents (19 chapters)
1
Section 1: Introduction to Kubernetes
7
Section 2: Securing Kubernetes Deployments and Clusters
14
Section 3: Learning from Mistakes and Pitfalls

DoS issues in JSON parsing – CVE-2019-1002100

Patching is a commonly used technique used to update API objects at runtime. Developers use kubectl patch to update API objects at runtime. A simple example of this can be adding a container to a pod:

spec:
  template:
    spec:
      containers:
      - name: db
        image: redis

The preceding patch file allows a pod to be updated to have a new Redis container. kubectl patch allows patches to be in JSON format. The issue was in the JSON parsing code of kube-apiserver, which allowed an attacker to send a malformed json-patch instance to cause a DoS attack in the API server. In Chapter 10, Real-Time Monitoring and Resource Management of a Kubernetes Cluster, we discussed the importance of the availability of services within Kubernetes clusters. The root cause of this issue was unchecked error conditions...