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18 lines
1.5 KiB
Markdown
18 lines
1.5 KiB
Markdown
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### [CVE-2023-26484](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-26484)
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### Description
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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.
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### POC
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#### Reference
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- https://github.com/kubevirt/kubevirt/issues/9109
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#### Github
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No PoCs found on GitHub currently.
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