kubevirt up to 1.5.2/1.6.0 allowed improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in kubevirt up to 1.5.2/1.6.0. Affected by this vulnerability is an unknown functionality. This manipulation of the argument allowed causes improper authentication. This vulnerability appears as CVE-2025-64432. The attack requires local access. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in kubevirt up to 1.5.2/1.6.0 and classified as critical. Affected by this vulnerability is an unknown code. The manipulation of the argument allowed with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

KubeVirt is a virtual machine management add-on for Kubernetes. Versions 1.5.3 and below, and 1.6.0 contained a flawed implementation of the Kubernetes aggregation layer's authentication flow which could enable bypass of RBAC controls. It was discovered that the virt-api component fails to correctly authenticate the client when receiving API requests over mTLS. In particular, it fails to validate the CN (Common Name) field in the received client TLS certificates against the set of allowed values defined in the extension-apiserver-authentication configmap. Failre to validate certain fields in the client TLS certificate may allow an attacker to bypass existing RBAC controls by directly communicating with the aggregated API server, impersonating the Kubernetes API server and its aggregator component. This issue is fixed in versions 1.5.3 and 1.6.1.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-64432 since 11/03/2025. The exploitation appears to be difficult. An attack has to be approached locally. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 278074 (SUSE SLES15 Security Update : kubevirt, virt-api-container, virt-controller-container, virt-exportproxy-container, virt-exportserver-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container, virt-pr-helper-container (SUSE-SU-2025:4330-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.5.3 or 1.6.1 eliminates this vulnerability. Applying the patch 231dc69723f331dc02f65a31ab4c3d6869f40d6a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (278074) and EUVD (EUVD-2025-38218). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔒

CNA Base Score: 4.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 278074
Nessus Name: SUSE SLES15 Security Update : kubevirt, virt-api-container, virt-controller-container, virt-exportproxy-container, virt-exportserver-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container, virt-pr-helper-container (SUSE-SU-2025:4330-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: kubevirt 1.5.3/1.6.1
Patch: 231dc69723f331dc02f65a31ab4c3d6869f40d6a

Timelineinfo

11/03/2025 CVE reserved
11/08/2025 +5 days Advisory disclosed
11/08/2025 +0 days VulDB entry created
12/11/2025 +33 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-38jw-g2qx-4286
Status: Confirmed

CVE: CVE-2025-64432 (🔒)
GCVE (CVE): GCVE-0-2025-64432
GCVE (VulDB): GCVE-100-331573
EUVD: 🔒

Entryinfo

Created: 11/08/2025 07:32
Updated: 12/11/2025 15:36
Changes: 11/08/2025 07:32 (66), 11/15/2025 23:22 (1), 11/27/2025 05:34 (11), 12/11/2025 15:36 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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