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CVE-2021-32844

6.2 · MEDIUM

HyperKit is a toolkit for embedding hypervisor capabilities in an application.

Published Feb 17, 2023CWE-476EPSS 0.23%

Overview

CVE-2021-32844 is a medium-severity vulnerability. It was published on February 17, 2023 and has a CVSS 3.1 base score of 6.2 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.2, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, ` vi_pci_write` has is a call to `vc_cfgwrite` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/moby/hyperkit/commit/451558fe8aaa8b24e02e34106e3bb9fe41d7ad13GitHubgithub.com/moby/hyperkit/pull/313GitHubsecuritylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/GitHubgithub.com/moby/hyperkit/commit/451558fe8aaa8b24e02e34106e3bb9fe41d7ad13GitHubgithub.com/moby/hyperkit/pull/313GitHubsecuritylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-32844?

CVE-2021-32844 is a medium-severity vulnerability. It was published on February 17, 2023 and has a CVSS 3.1 base score of 6.2 (MEDIUM).

How severe is CVE-2021-32844?

This vulnerability has a CVSS 3.1 base score of 6.2, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-32844?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-32844?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-32844 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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