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Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4463-1)

medium Nessus Plugin ID 139662

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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-4463-1 advisory.

 - An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails. (CVE-2020-12771)

 - In the Linux kernel 4.4 through 5.7.6, usbtest_disconnect in drivers/usb/misc/usbtest.c has a memory leak, aka CID-28ebeb8db770. (CVE-2020-15393)

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-4463-1

Plugin Details

Severity: Medium

ID: 139662

File Name: ubuntu_USN-4463-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 8/18/2020

Updated: 1/9/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.8

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

CVSS Score Source: CVE-2020-12771

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

CVSS Score Source: CVE-2020-15393

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1078-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1112-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1137-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1141-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-187-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-187-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-187-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-187-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-187-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-187-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-187-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:16.04:-:lts

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/18/2020

Vulnerability Publication Date: 5/9/2020

Reference Information

CVE: CVE-2020-12771, CVE-2020-15393

USN: 4463-1