Summary
In this chapter, we discussed the importance of CVEs. These publicly known identifiers are important for cluster administrators, security researchers, and attackers. We discussed the important aspects of CVE entries, which are maintained by MITRE. We then looked at four well-known CVEs and discussed the issue and the mitigation strategy for each CVE. As a cluster administrator, upgrading the kubectl client and Kubernetes version should always be your first priority. However, adding mitigation strategies to detect and prevent exploits caused by similar issues that have not been reported publicly is equally important. Finally, we discussed an open source tool, kube-hunter, which can be used to periodically identify issues in your Kubernetes cluster. This removes the overhead of cluster administrators keeping a close eye on security advisories and announcements by Kubernetes.
Now, you should be able to understand the importance of publicly disclosed vulnerabilities and how...