* Support secure etcd cluster for centos provider. ([#42994](https://github.com/kubernetes/kubernetes/pull/42994), [@Shawyeok](https://github.com/Shawyeok))

### CVE-2022-3294: Node address isn't always verified when proxying

A security issue was discovered in Kubernetes where users may have access to secure endpoints in the control plane network. Kubernetes clusters are only affected if an untrusted user can to modify Node objects and send requests proxying through them.

- Added `kubeadm alpha certs certificate-key` command to generate secure random key to use on `kubeadm init --experimental-upload-certs` ([#77848](https://github.com/kubernetes/kubernetes/pull/77848), [@yagonobre](https://github.com/yagonobre))

- kubeadm: consider --bind-address or --advertise-address and --secure-port for control plane components when the feature gate WaitForAllControlPlaneComponents is enabled. Use /livez for kube-apiserver and kube-scheduler, but continue using /healthz for kube-controller-manager until it supports /livez. ([#128474](ht...

### CVE-2022-3294: Node address isn't always verified when proxying

A security issue was discovered in Kubernetes where users may have access to secure endpoints in the control plane network. Kubernetes clusters are only affected if an untrusted user can to modify Node objects and send requests proxying through them.

- kubeadm: provide `--control-plane-endpoint` flag for `controlPlaneEndpoint` ([#79270](https://github.com/kubernetes/kubernetes/pull/79270), [@SataQiu](https://github.com/SataQiu))
- kubeadm: enable secure serving for the kube-scheduler ([#80951](https://github.com/kubernetes/kubernetes/pull/80951), [@neolit123](https://github.com/neolit123))

        * [Build a Secure Twilio Webhook with Python and FastAPI](https://www.twilio.com/blog/build-secure-twilio-webhook-python-fastapi)  by [Twilio](https://www.twilio.com).

### CVE-2022-3294: Node address isn't always verified when proxying

A security issue was discovered in Kubernetes where users may have access to secure endpoints in the control plane network. Kubernetes clusters are only affected if an untrusted user can to modify Node objects and send requests proxying through them.

* Kubernetes now supports up to 5,000 nodes via etcd v3, which is enabled by default.
* [Role-based access control (RBAC)](https://kubernetes.io//docs/admin/authorization/rbac) has graduated to beta, and defines secure default roles for control plane, node, and controller components.
* The [`kubeadm` cluster bootstrap tool](https://kubernetes.io/docs/getting-started-guides/kubeadm/) has graduated to beta. Some highlights:

   limitations under the License.


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Copyright (c) 2019 SecureIO