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Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4876-1)

high Nessus Plugin ID 148001

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Synopsis

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

Description

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4876-1 advisory.

 Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the Xen paravirt block backend in the Linux kernel, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29569)

 It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad- hoc SSIDs. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-36158)

 discovered that the NFS implementation in the Linux kernel did not properly prevent access outside of an NFS export that is a subdirectory of a file system. An attacker could possibly use this to bypass NFS access restrictions. (CVE-2021-3178)

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.

See Also

https://ubuntu.com/security/notices/USN-4876-1

Plugin Details

Severity: High

ID: 148001

File Name: ubuntu_USN-4876-1.nasl

Version: 1.7

Type: local

Agent: unix

Published: 3/23/2021

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2020-36158

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2020-29569

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1151-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-204-generic, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-204-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-204-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1147-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-204-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1123-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-204-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-204-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-204-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1089-kvm

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/16/2021

Vulnerability Publication Date: 12/15/2020

Reference Information

CVE: CVE-2020-29569, CVE-2020-36158, CVE-2021-3178

USN: 4876-1