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Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-4342-1)

high Nessus Plugin ID 136085

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Synopsis

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

Description

The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4342-1 advisory.

 Al Viro discovered that the Linux kernel for s390x systems did not properly perform page table upgrades for kernel sections that use secondary address mode. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2020-11884)

 It was discovered that the Intel Wi-Fi driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service (system crash).
 (CVE-2019-16234)

 Tristan Madani discovered that the block I/O tracing implementation in the Linux kernel contained a race condition. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2019-19768)

 It was discovered that the vhost net driver in the Linux kernel contained a stack buffer overflow. A local attacker with the ability to perform ioctl() calls on /dev/vhost-net could use this to cause a denial of service (system crash). (CVE-2020-10942)

 It was discovered that the virtual terminal implementation in the Linux kernel contained a race condition.
 A local attacker could possibly use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2020-8648)

 Shijie Luo discovered that the ext4 file system implementation in the Linux kernel did not properly check for a too-large journal size. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (soft lockup). (CVE-2020-8992)

 Jordy Zomer discovered that the floppy driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-9383)

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-4342-1

Plugin Details

Severity: High

ID: 136085

File Name: ubuntu_USN-4342-1.nasl

Version: 1.10

Type: local

Agent: unix

Published: 4/29/2020

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: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.4

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

CVSS Score Source: CVE-2020-11884

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

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

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

CVSS Score Source: CVE-2020-9383

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1018-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1020-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1023-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-51-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-51-lowlatency, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-51-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1016-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1018-gcp

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: 4/30/2020

Vulnerability Publication Date: 9/11/2019

Reference Information

CVE: CVE-2019-16234, CVE-2019-19768, CVE-2020-10942, CVE-2020-11884, CVE-2020-8648, CVE-2020-8992, CVE-2020-9383

USN: 4342-1