Detections
Analytics

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 / 25.04 : Intel Microcode vulnerabilities (USN-7535-1)

medium Nessus Plugin ID 237338

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 / 25.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7535-1 advisory.

 Sander Wiebing and Cristiano Giuffrida discovered that some Intel Processors did not properly handle data in Shared Microarchitectural Structures during Transient Execution. An authenticated attacker could possibly use this issue to obtain sensitive information. (CVE-2024-28956)

 It was discovered that some Intel Processors did not properly handle prediction calculations. An authenticated attacker could possibly use this issue to obtain sensitive information. (CVE-2024-43420, CVE-2024-45332, CVE-2025-20623)

 It was discovered that some Intel Processors did not properly initialize resources in the branch prediction unit. An authenticated attacker could possibly use this issue to obtain sensitive information.
 (CVE-2025-20012, CVE-2025-24495)

 Michal Raviv and Jeff Gilbert discovered that some Intel Processors did not properly handle resources and exceptions in the core management mechanism. An authenticated attacker could possibly use this issue to cause a denial of service. (CVE-2025-20054, CVE-2025-20103)

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

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

Solution

Update the affected intel-microcode package.

See Also

https://ubuntu.com/security/notices/USN-7535-1

Plugin Details

Severity: Medium

ID: 237338

File Name: ubuntu_USN-7535-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 5/27/2025

Updated: 5/27/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2025-20012

CVSS v3

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.9

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

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

CVSS Score Source: CVE-2025-24495

CVSS v4

Risk Factor: Medium

Base Score: 6.8

Threat Score: 3.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS Score Source: CVE-2025-24495

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:intel-microcode, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.10, cpe:/o:canonical:ubuntu_linux:25.04

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/27/2025

Vulnerability Publication Date: 5/12/2025

Reference Information

CVE: CVE-2024-28956, CVE-2024-43420, CVE-2024-45332, CVE-2025-20012, CVE-2025-20054, CVE-2025-20103, CVE-2025-20623, CVE-2025-24495

USN: 7535-1