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Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 : AMD Microcode vulnerability (USN-6319-1)

medium Nessus Plugin ID 180268

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 host has a package installed that is affected by a vulnerability as referenced in the USN-6319-1 advisory.

 - A side channel vulnerability on some of the AMD CPUs may allow an attacker to influence the return address prediction. This may result in speculative execution at an attacker-controlled?address, potentially leading to information disclosure. (CVE-2023-20569)

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 amd64-microcode package.

See Also

https://ubuntu.com/security/notices/USN-6319-1

Plugin Details

Severity: Medium

ID: 180268

File Name: ubuntu_USN-6319-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 8/30/2023

Updated: 9/26/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Low

Base Score: 3.8

Temporal Score: 3

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

CVSS Score Source: CVE-2023-20569

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.2

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:esm, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:23.04, p-cpe:/a:canonical:ubuntu_linux:amd64-microcode

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/30/2023

Vulnerability Publication Date: 8/3/2023

Reference Information

CVE: CVE-2023-20569

USN: 6319-1