CVE-2023-26484
KubeVirt Node Takeover Privilege Escalation
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.
INFO
Published Date :
March 15, 2023, 9:15 p.m.
Last Modified :
March 27, 2023, 4:58 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.8
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-26484.
| URL | Resource |
|---|---|
| https://github.com/kubevirt/kubevirt/issues/9109 | Issue Tracking Third Party Advisory |
| https://github.com/kubevirt/kubevirt/security/advisories/GHSA-cp96-jpmq-xrr2 | Mitigation Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-26484 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-26484 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Mar. 27, 2023
Action Type Old Value New Value Removed CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N Added CVSS V3.1 NIST AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N -
Initial Analysis by [email protected]
Mar. 23, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N Changed Reference Type https://github.com/kubevirt/kubevirt/issues/9109 No Types Assigned https://github.com/kubevirt/kubevirt/issues/9109 Issue Tracking, Third Party Advisory Changed Reference Type https://github.com/kubevirt/kubevirt/security/advisories/GHSA-cp96-jpmq-xrr2 No Types Assigned https://github.com/kubevirt/kubevirt/security/advisories/GHSA-cp96-jpmq-xrr2 Mitigation, Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:kubevirt:kubevirt:*:*:*:*:*:kubernetes:*:* versions up to (including) 0.59.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-26484 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-26484
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.00%
score
0.29213
percentile