cve-2023-26484
Vulnerability from cvelistv5
Published
2023-03-15 20:40
Modified
2024-08-02 11:53
Severity ?
EPSS score ?
Summary
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.
References
▼ | URL | Tags | |
---|---|---|---|
security-advisories@github.com | https://github.com/kubevirt/kubevirt/issues/9109 | Issue Tracking, Third Party Advisory | |
security-advisories@github.com | https://github.com/kubevirt/kubevirt/security/advisories/GHSA-cp96-jpmq-xrr2 | Mitigation, Vendor Advisory | |
af854a3a-2127-422b-91ae-364da2661108 | https://github.com/kubevirt/kubevirt/issues/9109 | Issue Tracking, Third Party Advisory | |
af854a3a-2127-422b-91ae-364da2661108 | https://github.com/kubevirt/kubevirt/security/advisories/GHSA-cp96-jpmq-xrr2 | Mitigation, Vendor Advisory |
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.