FreeBSD : FreeBSD -- bhyve SVM guest escape (e73c688b-f7e6-11ea-88f8-901b0ef719ab)

high Nessus Plugin ID 140630

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

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

Update the affected packages.

Plugin Details

Severity: High

ID: 140630

File Name: freebsd_pkg_e73c688bf7e611ea88f8901b0ef719ab.nasl

Version: 1.3

Type: local

Family: FreeBSD Local Security Checks

Published: 9/17/2020

Updated: 4/5/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2020-7467

CVSS v3

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.6

Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:freebsd, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Settings/ParanoidReport, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 9/16/2020

Vulnerability Publication Date: 9/15/2020

Reference Information

CVE: CVE-2020-7467

FreeBSD: SA-20:29.bhyve_svm

Detections

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