Vigil@nce - Xen: use after free via Block Frontend
February 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability
SYNTHESIS OF THE VULNERABILITY
Impacted products: XenServer, Debian, openSUSE Leap, SUSE Linux
Enterprise Desktop, SLES, Xen.
Severity: 2/4.
Consequences: administrator access/rights, denial of service on
server, denial of service on service.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 15/12/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker, inside a guest system, can force the usage of a freed
memory area via Block Frontend of Xen, in order to trigger a
denial of service, and possibly to run code on the host system.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Xen-use-after-free-via-Block-Frontend-34117