Vigil@nce - OpenBSD: use after free via Carp Interface Bpf
March 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability
SYNTHESIS OF THE VULNERABILITY
Impacted products: OpenBSD.
Severity: 2/4.
Consequences: administrator access/rights, denial of service on
server.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 13/01/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker can force the usage of a freed memory area via Carp
Interface Bpf of OpenBSD, in order to trigger a denial of service,
and possibly to run code.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/OpenBSD-use-after-free-via-Carp-Interface-Bpf-34339