CVE-2022-3294: Node address isn't always verified when proxying
Node address isn't always verified when proxying
Other sources
Users may have access to secure endpoints in the control plane network. Kubernetes clusters are only affected if an untrusted user can modify Node objects and send proxy requests to them. Kubernetes supports node proxying, which allows clients of kube-apiserver to access endpoints of a Kubelet to establish connections to Pods, retrieve container logs, and more. While Kubernetes already validates the proxying address for Nodes, a bug in kube-apiserver made it possible to bypass this validation. Bypassing this validation could allow authenticated requests destined for Nodes to to the API server's private network.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
go/github.com/kubernetes/kubernetesto a version that resolves this vulnerability.Fixed in 1.22.16 - Upgrade
Upgrade
go/github.com/kubernetes/kubernetesto a version that resolves this vulnerability.Fixed in 1.23.14 - Upgrade
Upgrade
go/github.com/kubernetes/kubernetesto a version that resolves this vulnerability.Fixed in 1.24.8 - Upgrade
Upgrade
go/github.com/kubernetes/kubernetesto a version that resolves this vulnerability.Fixed in 1.25.4 - Upgrade
Upgrade
debian/kubernetesto a version that resolves this vulnerability.Fixed in 1.20.5+really1.20.2-1.1+deb12u1Fixed in 1.32.3+ds-2Fixed in 1.36.4+ds-1 - Upgrade
Upgrade
debian/kubernetesto a version that resolves this vulnerability.Fixed in 1.20.5+really1.20.2-1
Event History
Frequently Asked Questions
What is CVE-2022-3294?
CVE-2022-3294 is a vulnerability that allows users to have access to secure endpoints in the control plane network of Kubernetes clusters.
How does CVE-2022-3294 affect Kubernetes clusters?
Kubernetes clusters are only affected if an untrusted user can modify Node objects and send proxy requests to them.
How can I fix CVE-2022-3294?
To fix CVE-2022-3294, update Kubernetes to version 1.22.16, 1.23.14, 1.24.8, or 1.25.4.
What is the severity of CVE-2022-3294?
CVE-2022-3294 has a severity rating of 8.8 (High).
Where can I find more information about CVE-2022-3294?
You can find more information about CVE-2022-3294 at the following references: [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-3294), [GitHub](https://github.com/kubernetes/kubernetes/issues/113757), [Google Groups](https://groups.google.com/g/kubernetes-security-announce/c/VyPOxF7CIbA)