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Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4708-1)

high Nessus Plugin ID 145510

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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-4708-1 advisory.

 Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly track inode validations. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service (system crash). (CVE-2018-13093)

 It was discovered that the btrfs file system implementation in the Linux kernel did not properly validate file system metadata in some situations. An attacker could use this to construct a malicious btrfs image that, when mounted, could cause a denial of service (system crash). (CVE-2019-19813, CVE-2019-19816)

 Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.
 (CVE-2020-25669)

 Daniel Axtens discovered that PowerPC RTAS implementation in the Linux kernel did not properly restrict memory accesses in some situations. A privileged local attacker could use this to arbitrarily modify kernel memory, potentially bypassing kernel lockdown restrictions. (CVE-2020-27777)

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-4708-1

Plugin Details

Severity: High

ID: 145510

File Name: ubuntu_USN-4708-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 1/28/2021

Updated: 8/28/2024

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: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.3

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

CVSS Score Source: CVE-2019-19816

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

CVSS Score Source: CVE-2020-25669

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-201-generic, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-201-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-201-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-201-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-201-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-201-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-201-powerpc-e500mc

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: 1/28/2021

Vulnerability Publication Date: 7/3/2018

Reference Information

CVE: CVE-2018-13093, CVE-2019-19813, CVE-2019-19816, CVE-2020-25669, CVE-2020-27777

BID: 104954

USN: 4708-1