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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.

 - A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root.
 We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28. (CVE-2023-1829)

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: 1.2

Type: local

Agent: unix

Published: 4/27/2023

Updated: 1/9/2024

Supported Sensors: Agentless 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:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1118-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1139-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1149-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1164-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-210-generic, 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, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1048-ibm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1068-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1090-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1098-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1100-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1101-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1104-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1107-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-148-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-148-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-148-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