CVE-2023-26484

Incorrect Authorization in go/github.com/kubevirt/kubevirt

Identifiers

CVE-2023-26484, GHSA-cp96-jpmq-xrr2

Package Slug

go/github.com/kubevirt/kubevirt

Vulnerability

Incorrect Authorization

Description

KubeVirt is a virtual machine management add-on for Kubernetes. In versions 0.59.0 and prior, if a malicious user has taken over a Kubernetes node where virt-handler (the KubeVirt node-daemon) is running, the virt-handler service account can be used to modify all node specs. This can be misused to lure-in system-level-privileged components which can, for instance, read all secrets on the cluster, or can exec into pods on other nodes. This way, a compromised node can be used to elevate privileges beyond the node until potentially having full privileged access to the whole cluster. The simplest way to exploit this, once a user could compromise a specific node, is to set with the virt-handler service account all other nodes to unschedulable and simply wait until system-critical components with high privileges appear on its node. No patches are available as of time of publication. As a workaround, gatekeeper users can add a webhook which will block the virt-handler service account to modify the spec of a node.

Affected Versions

All versions up to 0.59.0

Solution

Unfortunately, there is no solution available yet.

Last Modified

2023-03-24

source