Ensure all CPU vulnerabilities are mitigated

MediumLevel 1Manual reviewopenshift-virt

Description

Ensure that all known CPU vulnerabilities are mitigated. This ensures that known attacks, such as Spectre, Meltdown, etc. either do not affect the node or are mitigated via software. The benchmark marks this recommendation Manual; TMAegis reports it as a manual review item with the audit steps.

How it is checked

Audit method: Manual review

This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.

View CPU mitigations: $ ls /sys/devices/system/cpu/vulnerabilities Output may resemble the following: "Not affected" CPU is not affected by the vulnerability "Vulnerable" CPU is affected and no mitigation in effect "Mitigation: $M" CPU is affected and mitigation $M is in effect

How it is fixed

Fix method: Guidance or infrastructure patch

Add the appropriate kernel arguments to the MachineConfigPools of the workers nodes and reboot them. See Documentation Chapter 1.Customizing nodes | Red Hat Product Documentation

Properties

Operating systems: Any
Tags: openshift-virtmanual-review
Reference: CIS Red Hat OpenShift Virtual Machine Extension Benchmark v1.0.0 - 6.3 Ensure all CPU vulnerabilities are mitigated