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Ubuntu 18.04 LTS / 20.04 LTS : Intel Microcode vulnerabilities (USN-4628-3)

medium Nessus Plugin ID 149521

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Synopsis

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

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4628-3 advisory.

 USN-4628-1 provided updated Intel Processor Microcode for various processor types.

 This update provides the corresponding updates for some additional processor types.

 Original advisory details:

 Moritz Lipp, Michael Schwarz, Andreas Kogler, David Oswald, Catherine

 Easdon, Claudio Canella, and Daniel Gruss discovered that the Intel Running

 Average Power Limit (RAPL) feature of some Intel processors allowed a side-

 channel attack based on power consumption measurements. A local attacker

 could possibly use this to expose sensitive information. (CVE-2020-8695)

 Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that

 some Intel(R) Processors did not properly remove sensitive information

 before storage or transfer in some situations. A local attacker could

 possibly use this to expose sensitive information. (CVE-2020-8696)

 Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that

 some Intel(R) Processors did not properly isolate shared resources in some

 situations. A local attacker could possibly use this to expose sensitive

 information. (CVE-2020-8698)

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-4628-3

Plugin Details

Severity: Medium

ID: 149521

File Name: ubuntu_USN-4628-3.nasl

Version: 1.5

Type: local

Agent: unix

Published: 5/17/2021

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2020-8698

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:intel-microcode

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/17/2021

Vulnerability Publication Date: 11/11/2020

Reference Information

CVE: CVE-2020-8695, CVE-2020-8696, CVE-2020-8698

USN: 4628-3