Vigil@nce - FreeBSD: use after free via cryptodev
July 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulne...
SYNTHESIS OF THE VULNERABILITY
Impacted products: FreeBSD, pfSense.
Consequences: administrator access/rights, privileged access/rights, denial of service on server, denial of service on service.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 13/05/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via cryptodev of FreeBSD, in order to trigger a denial of service, and possibly to run code.
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