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FreeBSD : FreeBSD -- bhyve(8) virtual machine escape (e722e3c6-bbee-11e6-b1cf-14dae9d210b8)

high Nessus Plugin ID 95588

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Synopsis

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

Description

The bounds checking of accesses to guest memory greater than 4GB by device emulations is subject to integer overflow. Impact : For a bhyve virtual machine with more than 3GB of guest memory configured, a malicious guest could craft device descriptors that could give it access to the heap of the bhyve process. Since the bhyve process is running as root, this may allow guests to obtain full control of the hosts they're running on.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?7a685d8c

Plugin Details

Severity: High

ID: 95588

File Name: freebsd_pkg_e722e3c6bbee11e6b1cf14dae9d210b8.nasl

Version: 3.6

Type: local

Published: 12/7/2016

Updated: 1/15/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

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-2016-1889

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/6/2016

Vulnerability Publication Date: 12/6/2016

Reference Information

CVE: CVE-2016-1889

FreeBSD: SA-16:38.bhyve