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Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS : Linux kernel vulnerability (USN-6047-1)

high Nessus Plugin ID 174907

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-6047-1 advisory.

 It was discovered that the Traffic-Control Index (TCINDEX) implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for this CVE, kernel support for the TCINDEX classifier has been removed.

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-6047-1

Plugin Details

Severity: High

ID: 174907

File Name: ubuntu_USN-6047-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 4/27/2023

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: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-1829

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-5.4.0-1098-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1048-ibm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1118-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-210-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1149-gcp, cpe:/o:canonical:ubuntu_linux:16.04:-:esm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-148-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1164-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-148-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1090-kvm, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1107-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1100-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-148-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1068-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1104-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1139-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1101-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-210-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-210-lowlatency

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/27/2023

Vulnerability Publication Date: 4/12/2023

Reference Information

CVE: CVE-2023-1829

USN: 6047-1