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FreeBSD: VID-E73C688B-F7E6-11EA-88F8-901B0EF719AB (CVE-2020-7467): FreeBSD -- bhyve SVM guest escape

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FreeBSD: VID-E73C688B-F7E6-11EA-88F8-901B0EF719AB (CVE-2020-7467): FreeBSD -- bhyve SVM guest escape

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
09/15/2020
Created
09/19/2020
Added
09/17/2020
Modified
04/05/2021

Description

Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.

From VID-E73C688B-F7E6-11EA-88F8-901B0EF719AB:

Problem Description:

A number of AMD virtualization instructions operate on host physical

addresses, are not subject to nested page table translation, and guest use of

these instructions was not trapped.

Impact:

From kernel mode a malicious guest can write to arbitrary host memory (with

some constraints), affording the guest full control of the host.

Solution(s)

  • freebsd-upgrade-base-11_3-release-p14
  • freebsd-upgrade-base-11_4-release-p4
  • freebsd-upgrade-base-12_1-release-p10

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