CVE-2020-14316

Description

A flaw was found in kubevirt 0.29 and earlier. Virtual Machine Instances (VMIs) can be used to gain access to the host's filesystem. Successful exploitation allows an attacker to assume the privileges of the VM process on the host system. In worst-case scenarios an attacker can read and modify any file on the system where the VMI is running. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Statement

OpenShift Virtualization 1.4 and 2.3 use affected version of kubevirt in virt-launcher container, however impact is rated Moderate as VMIs are running as non-root and thus have limited access to the host's filesystem.

Mitigation

This flaw can be partially or completely mitigated by leveraging existing mechanisms to restrict the VMI process such as running as non-root and using SELinux and sVirt whenever possible.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score9.99.9N/A
Attack VectorNetworkNetworkN/A
Attack ComplexityLowLowN/A
Privileges RequiredLowLowN/A
User InteractionNoneNoneN/A
ScopeChangedChangedN/A
ConfidentialityHighHighN/A
Integrity ImpactHighHighN/A
Availability ImpactHighHighN/A

Vector

Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Understanding the Weakness (CWE)

CWE-284

Other

Technical Impact: Varies by Context

Acknowledgements

This issue was discovered by Fabian Deutsch (Red Hat).

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