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Ubuntu 18.04 LTS : Linux kernel vulnerability (USN-4313-1)

high Nessus Plugin ID 135029

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4313-1 advisory.

 - In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780) (CVE-2020-8835)

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-4313-1

Plugin Details

Severity: High

ID: 135029

File Name: ubuntu_USN-4313-1.nasl

Version: 1.10

Type: local

Agent: unix

Published: 3/31/2020

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: Critical

Score: 9.0

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2020-8835

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: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1013-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1016-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1016-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1018-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1021-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-45-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-45-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-45-lowlatency, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/30/2020

Vulnerability Publication Date: 4/2/2020

Reference Information

CVE: CVE-2020-8835

USN: 4313-1