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Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-4411-1)

medium Nessus Plugin ID 138136

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Synopsis

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

Description

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4411-1 advisory.

 It was discovered that the elf handling code in the Linux kernel did not initialize memory before using it in certain situations. A local attacker could use this to possibly expose sensitive information (kernel memory). (CVE-2020-10732)

 Matthew Sheets discovered that the SELinux network label handling implementation in the Linux kernel could be coerced into de-referencing a NULL pointer. A remote attacker could use this to cause a denial of service (system crash). (CVE-2020-10711)

 It was discovered that the SCSI generic (sg) driver in the Linux kernel did not properly handle certain error conditions correctly. A local privileged attacker could use this to cause a denial of service (system crash). (CVE-2020-12770)

 It was discovered that the USB Gadget device driver in the Linux kernel did not validate arguments passed from configfs in some situations. A local attacker could possibly use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-13143)

 It was discovered that the KVM implementation in the Linux kernel did not properly deallocate memory on initialization for some processors. A local attacker could possibly use this to cause a denial of service.
 (CVE-2020-12768)

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-4411-1

Plugin Details

Severity: Medium

ID: 138136

File Name: ubuntu_USN-4411-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 7/6/2020

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: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2020-12770

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

Vector: CVSS:3.0/AV:L/AC:L/PR:H/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-5.4.0-1013-raspi, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1019-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1018-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1019-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-40-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1020-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-40-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-40-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-28-generic

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/6/2020

Vulnerability Publication Date: 5/9/2020

Reference Information

CVE: CVE-2020-10711, CVE-2020-10732, CVE-2020-12768, CVE-2020-12770, CVE-2020-13143

USN: 4411-1