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.
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