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Ubuntu 20.04 LTS : Linux kernel vulnerability (USN-5219-1)

high Nessus Plugin ID 156608

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-5219-1 advisory.

 It was discovered that the eBPF implementation in the Linux kernel did not properly validate the memory size of certain ring buffer operation arguments. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-5219-1

Plugin Details

Severity: High

ID: 156608

File Name: ubuntu_USN-5219-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 1/11/2022

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

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

CVSS Score Source: CVE-2021-4204

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1025-azure, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1025-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.10.0-1055-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-46-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1026-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-46-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1025-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-46-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-46-generic-64k

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/11/2022

Vulnerability Publication Date: 1/11/2022

Reference Information

CVE: CVE-2021-4204

USN: 5219-1