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Vigil@nce - FreeBSD: privilege escalation via grub2-bhyve Font Loading

March 2020 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability

SYNTHESIS OF THE VULNERABILITY

Impacted products: FreeBSD.

Severity: 1/4.

Consequences: administrator access/rights, privileged
access/rights.

Provenance: privileged shell.

Confidence: confirmed by the editor (5/5).

Creation date: 16/03/2020.

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.

ACCESS TO THE FULL VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/FreeBSD-privilege-escalation-via-grub2-bhyve-Font-Loading-31798


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