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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.

 - An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information. (CVE-2021-4204)

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: 1.7

Type: local

Agent: unix

Published: 1/11/2022

Updated: 1/9/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

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

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

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