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Vigil@nce - Xen: memory corruption via AMD IOMMU Pagetables Dynamic Height

February 2020 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/?langue=2

SYNTHESIS OF THE VULNERABILITY

Impacted products: XenServer, Debian, Fedora, openSUSE Leap, SUSE
Linux Enterprise Desktop, SLES, Xen.

Severity: 2/4.

Consequences: administrator access/rights, denial of service on
server.

Provenance: user shell.

Confidence: confirmed by the editor (5/5).

Creation date: 11/12/2019.

DESCRIPTION OF THE VULNERABILITY

An attacker, inside a guest system, can trigger a memory
corruption via AMD IOMMU Pagetables Dynamic Height 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-memory-corruption-via-AMD-IOMMU-Pagetables-Dynamic-Height-31127


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