Ubuntu 18.04 LTS / 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4917-1)

high Nessus Plugin ID 148690

Synopsis

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

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS / 20.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4917-1 advisory.

- BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. (CVE-2021-29154)

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 packages.

See Also

https://ubuntu.com/security/notices/USN-4917-1

Plugin Details

Severity: High

ID: 148690

File Name: ubuntu_USN-4917-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 4/16/2021

Updated: 1/21/2022

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

Risk Information

CVSS Score Source: CVE-2021-3493

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:H/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.10, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.10.0-1022-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1039-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1042-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-73-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-73-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1014-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1034-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1038-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1042-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1042-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1043-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1045-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1046-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-72-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-72-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-72-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1021-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1021-raspi-nolpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1024-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1026-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1028-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1029-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-1030-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-50-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-50-generic-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-50-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.8.0-50-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-64k-hwe-20.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-20.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-20.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke-5.3, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-image-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-gkeop-5.3, p-cpe:/a:canonical:ubuntu_linux:linux-image-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-image-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-20.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-20.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-20.04b, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi-nolpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-snapdragon-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-snapdragon-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-20.04-edge

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/15/2021

Vulnerability Publication Date: 4/8/2021

Exploitable With

Metasploit (2021 Ubuntu Overlayfs LPE)

Reference Information

CVE: CVE-2021-3492, CVE-2021-3493, CVE-2021-29154

USN: 4917-1