Amazon Linux 2 : microcode_ctl (ALAS-2023-2056)

medium Nessus Plugin ID 176705

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of microcode_ctl installed on the remote host is prior to 2.1-47. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2056 advisory.

- Insufficient granularity of access control in out-of-band management in some Intel(R) Atom and Intel Xeon Scalable Processors may allow a privileged user to potentially enable escalation of privilege via adjacent network access. (CVE-2022-21216)

- Incorrect default permissions in some memory controller configurations for some Intel(R) Xeon(R) Processors when using Intel(R) Software Guard Extensions which may allow a privileged user to potentially enable escalation of privilege via local access. (CVE-2022-33196)

- Incorrect calculation in microcode keying mechanism for some 3rd Generation Intel(R) Xeon(R) Scalable Processors may allow a privileged user to potentially enable information disclosure via local access.
(CVE-2022-33972)

- Improper isolation of shared resources in some Intel(R) Processors when using Intel(R) Software Guard Extensions may allow a privileged user to potentially enable information disclosure via local access.
(CVE-2022-38090)

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

Solution

Run 'yum update microcode_ctl' to update your system.

Plugin Details

Severity: Medium

ID: 176705

File Name: al2_ALAS-2023-2056.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 6/5/2023

Updated: 5/10/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, 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:A/AC:L/Au:M/C:C/I:C/A:C

CVSS Score Source: CVE-2022-21216

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:microcode_ctl, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:microcode_ctl-debuginfo

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/25/2023

Vulnerability Publication Date: 2/16/2023

Reference Information

CVE: CVE-2022-21216, CVE-2022-33196, CVE-2022-33972, CVE-2022-38090

Detections

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