Scientific Linux Security Update : microcode_ctl on SL6.x, SL7.x i386/x86_64 (20180116) (Spectre)

medium Nessus Plugin ID 106227
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The remote Scientific Linux host is missing one or more security updates.


This update supersedes the previous microcode update provided with the CVE-2017-5715 (Spectre) CPU branch injection vulnerability mitigation.
Further testing has uncovered problems with the microcode provided along with the Spectre mitigation that could lead to system instabilities.

As a result, this microcode update reverts to the last known good microcode version dated before 03 January 2018.

You should contact your hardware provider for the latest microcode updates.

IMPORTANT: If you are using Intel Skylake-, Broadwell-, and Haswell-based platforms, obtain and install updated microcode from your hardware vendor immediately. The 'Spectre' mitigation requires both an updated kernel and updated microcode from your hardware vendor.


Update the affected microcode_ctl and / or microcode_ctl-debuginfo packages.

See Also

Plugin Details

Severity: Medium

ID: 106227

File Name: sl_20180116_microcode_ctl_on_SL6_x.nasl

Version: 3.10

Type: local

Agent: unix

Published: 1/22/2018

Updated: 4/15/2021

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: High

Score: 7.6


Risk Factor: Low

Base Score: 1.9

Temporal Score: 1.7

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

Temporal Vector: E:H/RL:OF/RC:C


Risk Factor: Medium

Base Score: 5.6

Temporal Score: 5.4

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

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:fermilab:scientific_linux:microcode_ctl, p-cpe:/a:fermilab:scientific_linux:microcode_ctl-debuginfo, x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/16/2018

Vulnerability Publication Date: 1/4/2018

Reference Information

CVE: CVE-2017-5715

IAVA: 2018-A-0020