CVE-2023-26484
On a compromised KubeVirt node, the virt-handler service account can be used to modify all node specs
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2023-02-23 CVE Reserved
- 2023-03-15 CVE Published
- 2024-08-02 CVE Updated
- 2024-10-05 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-863: Incorrect Authorization
CAPEC
References (2)
URL | Tag | Source |
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https://github.com/kubevirt/kubevirt/issues/9109 | Issue Tracking |
URL | Date | SRC |
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URL | Date | SRC |
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URL | Date | SRC |
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https://github.com/kubevirt/kubevirt/security/advisories/GHSA-cp96-jpmq-xrr2 | 2023-03-27 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Kubevirt Search vendor "Kubevirt" | Kubevirt Search vendor "Kubevirt" for product "Kubevirt" | <= 0.59.0 Search vendor "Kubevirt" for product "Kubevirt" and version " <= 0.59.0" | kubernetes |
Affected
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