Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-32845

7.7 · HIGH

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

Published Feb 17, 2023CWE-908EPSS 0.25%

Overview

CVE-2021-32845 is a high-severity vulnerability. It was published on February 17, 2023 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. 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, the implementation of `qnotify` at `pci_vtrnd_notify` fails to check the return value of `vq_getchain`. This leads to `struct iovec iov;` being uninitialized and used to read memory in `len = (int) read(sc->vrsc_fd, iov.iov_base, iov.iov_len);` when an attacker is able to make `vq_getchain` fail. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit 41272a980197917df8e58ff90642d14dec8fe948.

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/41272a980197917df8e58ff90642d14dec8fe948GitHubgithub.com/moby/hyperkit/pull/313GitHubsecuritylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/GitHubgithub.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948GitHubgithub.com/moby/hyperkit/pull/313GitHubsecuritylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-32845?

CVE-2021-32845 is a high-severity vulnerability. It was published on February 17, 2023 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2021-32845?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. 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-2021-32845?

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-2021-32845?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-32845 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.

Related HIGH CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999