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Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4363-1)

high Nessus Plugin ID 136710

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Synopsis

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

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4363-1 advisory.

 It was discovered that the Serial CAN interface driver in the Linux kernel did not properly initialize data. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-11494)

 It was discovered that the linux kernel did not properly validate certain mount options to the tmpfs virtual memory file system. A local attacker with the ability to specify mount options could use this to cause a denial of service (system crash). (CVE-2020-11565)

 David Gibson discovered that the Linux kernel on Power9 CPUs did not properly save and restore Authority Mask registers state in some situations. A local attacker in a guest VM could use this to cause a denial of service (host system crash). (CVE-2020-11669)

 It was discovered that the block layer in the Linux kernel contained a race condition leading to a use- after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2020-12657)

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-4363-1

Plugin Details

Severity: High

ID: 136710

File Name: ubuntu_USN-4363-1.nasl

Version: 1.9

Type: local

Agent: unix

Published: 5/19/2020

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: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2020-12657

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1067-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1071-gcp, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1079-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-101-generic-lpae, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1060-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1059-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1081-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1083-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1062-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1039-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-101-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-101-generic

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/28/2020

Vulnerability Publication Date: 4/2/2020

Reference Information

CVE: CVE-2020-11494, CVE-2020-11565, CVE-2020-11669, CVE-2020-12657

USN: 4363-1