Vigil@nce - FreeBSD: use after free via cryptodev
July 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability
SYNTHESIS OF THE VULNERABILITY
Impacted products: FreeBSD, pfSense.
Severity: 2/4.
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.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/FreeBSD-use-after-free-via-cryptodev-32254