Vigil@nce - FreeBSD: use after free via posix_openpt
September 2019 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerability-database-and-alert
SYNTHESIS OF THE VULNERABILITY
Impacted products: FreeBSD.
Severity: 2/4.
Consequences: administrator access/rights, denial of service on
server.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 25/07/2019.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via
posix_openpt() 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-posix-openpt-29875