Scientific Linux Security Update : microcode_ctl on SL7.x x86_64 (2021:2305)

high Nessus Plugin ID 150761
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Scientific Linux host is missing one or more security updates.

Description

The remote Scientific Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the SLSA-2021:2305-1 advisory.

- hw: vt-d related privilege escalation (CVE-2020-24489)

- hw: improper isolation of shared resources in some Intel Processors (CVE-2020-24511)

- hw: observable timing discrepancy in some Intel Processors (CVE-2020-24512)

- hw: information disclosure on some Intel Atom processors (CVE-2020-24513)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

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

See Also

https://www.scientificlinux.org/category/sl-errata/slsa-20212305-1

Plugin Details

Severity: High

ID: 150761

File Name: sl_20210614_microcode_ctl_on_SL7_x.nasl

Version: 1.3

Type: local

Agent: unix

Published: 6/14/2021

Updated: 7/2/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-24489

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/14/2021

Vulnerability Publication Date: 6/9/2021

Reference Information

CVE: CVE-2020-24489, CVE-2020-24511, CVE-2020-24512, CVE-2020-24513