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Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4211-1)

critical Nessus Plugin ID 131565

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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-4211-1 advisory.

 Zhipeng Xie discovered that an infinite loop could be triggered in the CFS Linux kernel process scheduler.
 A local attacker could possibly use this to cause a denial of service. (CVE-2018-20784)

 Nicolas Waisman discovered that the WiFi driver stack in the Linux kernel did not properly validate SSID lengths. A physically proximate attacker could use this to cause a denial of service (system crash).
 (CVE-2019-17133)

 Nicolas Waisman discovered that the Chelsio T4/T5 RDMA Driver for the Linux kernel performed DMA from a kernel stack. A local attacker could use this to cause a denial of service (system crash).
 (CVE-2019-17075)

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-4211-1

Plugin Details

Severity: Critical

ID: 131565

File Name: ubuntu_USN-4211-1.nasl

Version: 1.7

Type: local

Agent: unix

Published: 12/3/2019

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: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2019-17133

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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-4.4.0-170-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1126-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1063-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1130-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-powerpc64-emb, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-170-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1099-aws

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/3/2019

Vulnerability Publication Date: 2/22/2019

Reference Information

CVE: CVE-2018-20784, CVE-2019-17075, CVE-2019-17133

USN: 4211-1