Ubuntu 16.04 ESM / 18.04 LTS : Linux kernel vulnerabilities (USN-5209-1)

high Nessus Plugin ID 156484

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Synopsis

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

Description

The remote Ubuntu 16.04 ESM / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5209-1 advisory.

Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages. (CVE-2021-4002)

It was discovered that a race condition existed in the timer implementation in the Linux kernel. A privileged attacker could use this to cause a denial of service. (CVE-2021-20317)

It was discovered that a race condition existed in the overlay file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2021-20321)

It was discovered that the NFC subsystem in the Linux kernel contained a use-after-free vulnerability in its NFC Controller Interface (NCI) implementation. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-3760)

It was discovered that an integer overflow could be triggered in the eBPF implementation in the Linux kernel when preallocating objects for stack maps. A privileged local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-41864)

It was discovered that the ISDN CAPI implementation in the Linux kernel contained a race condition in certain situations that could trigger an array out-of-bounds bug. A privileged local attacker could possibly use this to cause a denial of service or execute arbitrary code. (CVE-2021-43389)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected kernel package.

Plugin Details

Severity: High

ID: 156484

File Name: ubuntu_USN-5209-1.nasl

Version: 1.10

Type: local

Agent: unix

Family: Ubuntu Local Security Checks

Published: 1/6/2022

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2021-3760

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

CVSS Score Source: CVE-2021-41864

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1118-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1129-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1105-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1101-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1033-dell300x, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1118-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-166-generic-lpae, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1114-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-166-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-166-generic, cpe:/o:canonical:ubuntu_linux:16.04:-:esm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1085-oracle

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: 1/6/2022

Vulnerability Publication Date: 9/27/2021

Reference Information

CVE: CVE-2021-20317, CVE-2021-20321, CVE-2021-3760, CVE-2021-4002, CVE-2021-41864, CVE-2021-43389

USN: 5209-1

Detections

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