CVE-2020-8554 PoC — Kubernetes man in the middle using LoadBalancer or ExternalIPs

Source

https://github.com/twistlock/k8s-cve-2020-8554-mitigations

Associated Vulnerability

Title:Kubernetes man in the middle using LoadBalancer or ExternalIPs (CVE-2020-8554)
Description:Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.

Description

Prisma Cloud Compute Admission rules to mitigate Kubernetes CVE-2020-8554

Readme

# Prisma Cloud Compute Mitigations for Kubernetes CVE-2020-8554
This repository contains Prisma Cloud Compute Admission rules that mitigate exploitation of CVE-2020-8554, an unpatched Kubernetes vulnerability. To ensure correct usage, please follow the instructions provided in the 'Prisma Cloud Mitigation' section of our response post, [Protecting Against Kubernetes CVE-2020-8554](https://unit42.paloaltonetworks.com/).

## Kubernetes CVE-2020-8554
Kubernetes CVE-2020-8554 is a design flaw allowing services to intercept cluster traffic to certain IPs, by setting their `.spec.exteralIPs` or `.status.loadBalancer.ingress[].ip` fields to those IPs. Non-admin users that can create or update services, or patch services' status, can exploit the vulnerability to perform [Man-in-The-Middle](https://attack.mitre.org/techniques/T1557/) attacks against pods and nodes in the cluster in an attempt to escalate their privileges.

## Further Reading 
For more information, refer to [Protecting Against Kubernetes CVE-2020-8554](https://unit42.paloaltonetworks.com/).

File Snapshot

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

View subscription plans →

Goal Reached Thanks to every supporter — we hit 100%!