Understanding and mitigating CVE-2020-8566: Ceph cluster admin credentials leaks in kube-controller-manager log

CVE-2020-8566 is a security vulnerability in Kubernetes that can lead to the leakage of sensitive admin credentials for Ceph storage users if specific conditions are met, namely when a Kubernetes cluster uses Ceph as a storage class and the kube-controller-manager logging level is set to four or above. This vulnerability allows anyone with access to the logs to impersonate the Ceph user, posing a risk to data security. The severity of this issue is medium unless the log level is deliberately set to verbose, escalating the risk to high. Mitigation steps include updating Ceph admin passwords and monitoring Kubernetes components for verbose logging using tools like Falco. The article emphasizes the importance of securing all Kubernetes components, not just the core ones like kube-apiserver and etcd, to prevent such vulnerabilities.