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CVE-2020-14372

7.5 · HIGH

A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled.

Published Mar 3, 2021CWE-184EPSS 1.74%

Overview

CVE-2020-14372 is a high-severity vulnerability. It was published on March 3, 2021 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 requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and 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

Refaccess.redhat.com/security/vulnerabilities/RHSB-2021-003Refbugzilla.redhat.com/show_bug.cgi?id=1873150Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/Refsecurity.gentoo.org/glsa/202104-05Refsecurity.netapp.com/advisory/ntap-20210416-0004/Refaccess.redhat.com/security/vulnerabilities/RHSB-2021-003Refbugzilla.redhat.com/show_bug.cgi?id=1873150Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/Refsecurity.gentoo.org/glsa/202104-05Refsecurity.netapp.com/advisory/ntap-20210416-0004/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-14372?

CVE-2020-14372 is a high-severity vulnerability. It was published on March 3, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-14372?

This vulnerability has a CVSS 3.1 base score of 7.5, 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-2020-14372?

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-2020-14372?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-14372 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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