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FreeBSD : FreeBSD -- L1 Terminal Fault (L1TF) Kernel Information Disclosure (2310b814-a652-11e8-805b-a4badb2f4699) (Foreshadow)

medium Nessus Plugin ID 112069

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Synopsis

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

Description

On certain Intel 64-bit x86 systems there is a period of time during terminal fault handling where the CPU may use speculative execution to try to load data. The CPU may speculatively access the level 1 data cache (L1D). Data which would otherwise be protected may then be determined by using side channel methods.

This issue affects bhyve on FreeBSD/amd64 systems. Impact : An attacker executing user code, or kernel code inside of a virtual machine, may be able to read secret data from the kernel or from another virtual machine.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?3494ddf7

Plugin Details

Severity: Medium

ID: 112069

File Name: freebsd_pkg_2310b814a65211e8805ba4badb2f4699.nasl

Version: 1.5

Type: local

Published: 8/23/2018

Updated: 8/15/2024

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 3.5

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

CVSS Score Source: CVE-2018-3646

CVSS v3

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.9

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

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: 8/22/2018

Vulnerability Publication Date: 8/14/2018

Reference Information

CVE: CVE-2018-3620, CVE-2018-3646

FreeBSD: SA-18:09.l1tf