Vigil@nce - Xen, Linux: denial of service via Netback Grant Mapping Errors
May 2021 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulne...
SYNTHESIS OF THE VULNERABILITY
Impacted products: XenServer, Debian, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Xen.
Consequences: denial of service on server, denial of service on service.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 04/03/2021.
DESCRIPTION OF THE VULNERABILITY
An attacker, inside a guest system, can trigger a fatal error via Netback Grant Mapping Errors of Xen with Linux, in order to trigger a denial of service on the host system.
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