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CVE-2020-27173

7.5 · HIGH

In vm-superio before 0.1.1, the serial console FIFO can grow to unlimited memory usage when data is sent to the input source (i.e., standard input).

Published Oct 16, 2020CWE-770EPSS 1.53%

Overview

CVE-2020-27173 is a high-severity vulnerability. It was published on October 16, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In vm-superio before 0.1.1, the serial console FIFO can grow to unlimited memory usage when data is sent to the input source (i.e., standard input). This behavior cannot be reproduced from the guest side. When no rate limiting is in place, the host can be subject to memory pressure, impacting all other VMs running on the same host.

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/rust-vmm/vm-superio/issues/17GitHubgithub.com/rust-vmm/vm-superio/pull/19GitHubgithub.com/rust-vmm/vm-superio/issues/17GitHubgithub.com/rust-vmm/vm-superio/pull/19

How CyberStrike helps

Frequently asked questions

What is CVE-2020-27173?

CVE-2020-27173 is a high-severity vulnerability. It was published on October 16, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-27173?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-27173?

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-2020-27173?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-27173 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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