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Vulnerability of FreeBSD: privilege escalation via grub2-bhyve Font Loading

Synthesis of the vulnerability 

An attacker, inside a guest system, can bypass restrictions via grub2-bhyve Font Loading of FreeBSD, in order to escalate his privileges on the host system.
Impacted software: FreeBSD.
Severity of this computer vulnerability: 1/4.
Creation date: 16/03/2020.
Références of this announce: CVE-2020-10566, VIGILANCE-VUL-31798.

Description of the vulnerability 

An attacker, inside a guest system, can bypass restrictions via grub2-bhyve Font Loading of FreeBSD, in order to escalate his privileges on the host system.
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This security threat impacts software or systems such as FreeBSD.

Our Vigil@nce team determined that the severity of this computer weakness note is low.

The trust level is of type confirmed by the editor, with an origin of privileged shell.

An attacker with a expert ability can exploit this computer threat alert.

Solutions for this threat 

FreeBSD: patch for grub2-bhyve.
A patch is indicated in information sources.
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