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CVE-2020-16843

5.9 · MEDIUM

In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic.

Published Aug 4, 2020EPSS 1.67%

Overview

CVE-2020-16843 is a medium-severity vulnerability. It was published on August 4, 2020 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.

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

Refwww.openwall.com/lists/oss-security/2020/08/13/1GitHubgithub.com/firecracker-microvm/firecracker/issues/2057Refwww.openwall.com/lists/oss-security/2020/08/13/1Refwww.openwall.com/lists/oss-security/2020/08/13/1GitHubgithub.com/firecracker-microvm/firecracker/issues/2057Refwww.openwall.com/lists/oss-security/2020/08/13/1

How CyberStrike helps

Frequently asked questions

What is CVE-2020-16843?

CVE-2020-16843 is a medium-severity vulnerability. It was published on August 4, 2020 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2020-16843?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-16843?

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-2020-16843?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-16843 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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