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CVE-2021-3623

6.1 · MEDIUM

A flaw was found in libtpms.

Published Mar 2, 2022CWE-787EPSS 0.32%

Overview

CVE-2021-3623 is a medium-severity vulnerability. It was published on March 2, 2022 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to 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=1976806GitHubgithub.com/stefanberger/libtpms/commit/2e6173cGitHubgithub.com/stefanberger/libtpms/commit/2f30d62GitHubgithub.com/stefanberger/libtpms/commit/7981d9aGitHubgithub.com/stefanberger/libtpms/pull/223Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7KZSYMTE7Z4BBEZUWO2DIMQDWMGEP46/Refbugzilla.redhat.com/show_bug.cgi?id=1976806GitHubgithub.com/stefanberger/libtpms/commit/2e6173cGitHubgithub.com/stefanberger/libtpms/commit/2f30d62GitHubgithub.com/stefanberger/libtpms/commit/7981d9a

How CyberStrike helps

Frequently asked questions

What is CVE-2021-3623?

CVE-2021-3623 is a medium-severity vulnerability. It was published on March 2, 2022 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2021-3623?

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-3623?

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-2021-3623?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-3623 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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