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CVE-2020-14339

8.8 · HIGH

A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process.

Published Dec 3, 2020CWE-772EPSS 0.42%

Overview

CVE-2020-14339 is a high-severity vulnerability. It was published on December 3, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. This flaw allows a malicious guest user or process to perform operations outside of their standard permissions, potentially causing serious damage to the host operating system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

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

Refbugzilla.redhat.com/show_bug.cgi?id=1860069Refsecurity.gentoo.org/glsa/202101-22Refsecurity.gentoo.org/glsa/202210-06Refbugzilla.redhat.com/show_bug.cgi?id=1860069Refsecurity.gentoo.org/glsa/202101-22Refsecurity.gentoo.org/glsa/202210-06

How CyberStrike helps

Frequently asked questions

What is CVE-2020-14339?

CVE-2020-14339 is a high-severity vulnerability. It was published on December 3, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2020-14339?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-14339?

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-2020-14339?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-14339 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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