cve/2020/CVE-2020-8561.md

### [CVE-2020-8561](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8561)
![](https://img.shields.io/static/v1?label=Product&message=Kubernetes&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%3D%201.20.11%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-441%20Unintended%20Proxy%20or%20Intermediary&color=brighgreen)

### Description

A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/adavarski/HomeLab-Proxmox-k8s-DevSecOps-playground
- https://github.com/adavarski/HomeLab-k8s-DevSecOps-playground