Vigil@nce - FreeBSD: privilege escalation via jail_remove Unkilled Processes
April 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2
SYNTHESIS OF THE VULNERABILITY
Impacted products: FreeBSD.
Consequences: administrator access/rights, privileged access/rights, user access/rights, data reading, data creation/edition.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 24/02/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker can bypass restrictions via jail_remove() Unkilled Processes of FreeBSD, in order to escalate his privileges.
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