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SUSE: CVE-2023-26484: SUSE Linux Security Advisory

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SUSE: CVE-2023-26484: SUSE Linux Security Advisory

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
03/15/2023
Created
05/05/2023
Added
04/25/2023
Modified
04/25/2023

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.

Solution(s)

  • suse-upgrade-kubevirt-container-disk
  • suse-upgrade-kubevirt-manifests
  • suse-upgrade-kubevirt-tests
  • suse-upgrade-kubevirt-virt-api
  • suse-upgrade-kubevirt-virt-controller
  • suse-upgrade-kubevirt-virt-handler
  • suse-upgrade-kubevirt-virt-launcher
  • suse-upgrade-kubevirt-virt-operator
  • suse-upgrade-kubevirt-virtctl
  • suse-upgrade-obs-service-kubevirt_containers_meta

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