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Vigil@nce - Xen: denial of service via the synchronization of memory access
November 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability
SYNTHESIS OF THE VULNERABILITY
Impacted products: XenServer, Debian, Fedora, openSUSE Leap, SUSE
Linux Enterprise Desktop, SLES, Xen.
Severity: 2/4.
Consequences: privileged access/rights, data reading, denial of
service on server, denial of service on service.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 23/09/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker, inside a guest system, can trigger a fatal error in
the synchronization of memory access in Xen, in order to trigger a
denial of service on the host system.
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