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Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4525-1)

high Nessus Plugin ID 140723

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Synopsis

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

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4525-1 advisory.

 It was discovered that the AMD Cryptographic Coprocessor device driver in the Linux kernel did not properly deallocate memory in some situations. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-18808)

 It was discovered that the Conexant 23885 TV card device driver for the Linux kernel did not properly deallocate memory in some error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-19054)

 It was discovered that the VFIO PCI driver in the Linux kernel did not properly handle attempts to access disabled memory spaces. A local attacker could use this to cause a denial of service (system crash).
 (CVE-2020-12888)

 It was discovered that the state of network RNG in the Linux kernel was potentially observable. A remote attacker could use this to expose sensitive information. (CVE-2020-16166)

 It was discovered that the NFS client implementation in the Linux kernel did not properly perform bounds checking before copying security labels in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25212)

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-4525-1

Plugin Details

Severity: High

ID: 140723

File Name: ubuntu_USN-4525-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 9/22/2020

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.3

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

CVSS Score Source: CVE-2020-25212

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/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:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1025-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-48-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-48-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-48-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1019-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1025-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1025-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1024-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1026-azure

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/21/2020

Vulnerability Publication Date: 11/7/2019

Reference Information

CVE: CVE-2019-18808, CVE-2019-19054, CVE-2020-12888, CVE-2020-16166, CVE-2020-25212

USN: 4525-1