Detections
Analytics

Amazon Linux 2 : microcode_ctl (ALAS-2023-2341)

high Nessus Plugin ID 185786

Language:

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 a vulnerability as referenced in the ALAS2-2023-2341 advisory.

 An issue was found in redundant REX instruction prefix values affecting third generation Intel Xeon Scalable (Icelake) processors. The issue may allow a local third-party actor using such instructions to cause a denial of service (DOS) or achieve privilege escalation. CVE-2023-23583 only affects Amazon Linux customers on EC2 metal platforms. Please refer to the AWS Security Bulletin for more information on the affected instance families and the impacts on AWS services:
 (https://aws.amazon.com/security/security-bulletins/AWS-2023-013). (CVE-2023-23583)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'yum update microcode_ctl' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2023-2341.html

https://alas.aws.amazon.com/cve/html/CVE-2023-23583.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: High

ID: 185786

File Name: al2_ALAS-2023-2341.nasl

Version: 1.5

Type: local

Agent: unix

Published: 11/15/2023

Updated: 12/11/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-23583

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: 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: 11/9/2023

Vulnerability Publication Date: 11/9/2023

Reference Information

CVE: CVE-2023-23583