You're reading from Learn Kubernetes Security Securely orchestrate, scale, and manage your microservices in Kubernetes deployments

Product type Paperback

Published in Jul 2020

Publisher Packt

ISBN-13 9781839216503

Length 330 pages

Edition 1st Edition

Languages

C++

Tools

Kubernetes

Concepts

Cloud Security

Authors (2):

Pranjal Jumde

Kaizhe Huang

View More author details

Table of Contents (19) Chapters

Preface

1. Section 1: Introduction to Kubernetes

2. Chapter 1: Kubernetes Architecture FREE CHAPTER

3. Chapter 2: Kubernetes Networking

4. Chapter 3: Threat Modeling

5. Chapter 4: Applying the Principle of Least Privilege in Kubernetes

6. Chapter 5: Configuring Kubernetes Security Boundaries

7. Section 2: Securing Kubernetes Deployments and Clusters

8. Chapter 6: Securing Cluster Components

9. Chapter 7: Authentication, Authorization, and Admission Control

10. Chapter 8: Securing Kubernetes Pods

11. Chapter 9: Image Scanning in DevOps Pipelines

12. Chapter 10: Real-Time Monitoring and Resource Management of a Kubernetes Cluster

13. Chapter 11: Defense in Depth

14. Section 3: Learning from Mistakes and Pitfalls

15. Chapter 12: Analyzing and Detecting Crypto-Mining Attacks

16. Chapter 13: Learning from Kubernetes CVEs

17. Assessments

18. Other Books You May Enjoy

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The path traversal issue in kubectl cp – CVE-2019-11246

Developers often copy files to or from containers in a Pod for debugging. kubectl cp allows developers to copy files from or to a container in a Pod (by default, this is done in the first container within the Pod).

To copy files to a Pod, you can use the following:

kubectl cp /tmp/test <pod>:/tmp/bar

To copy files from a Pod, you can use the following:

kubectl cp <some-pod>:/tmp/foo /tmp/bar

When files are copied from a pod, Kubernetes first creates a TAR archive of the files inside the container. It then copies the TAR archive to the client and then finally unpacks the TAR archive for the client. In 2018, researchers found a way to use kubectl cp to overwrite files on the client's host. If an attacker has access to a pod, this vulnerability could be used to replace the TAR archive with special files that use relative paths by overwriting the original TAR binary with a malicious one. When...