Detections
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Ubuntu 16.04 ESM : Linux kernel vulnerability (USN-5211-1)

medium Nessus Plugin ID 156483

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 ESM host has a package installed that is affected by a vulnerability as referenced in the USN-5211-1 advisory.

 Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue 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-5211-1

Plugin Details

Severity: Medium

ID: 156483

File Name: ubuntu_USN-5211-1.nasl

Version: 1.9

Type: local

Agent: unix

Published: 1/6/2022

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: Low

Score: 3.3

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.8

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

CVSS Score Source: CVE-2021-4002

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 4

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1099-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1134-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-218-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-218-lowlatency, cpe:/o:canonical:ubuntu_linux:16.04:-:esm

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: 1/6/2022

Vulnerability Publication Date: 12/8/2021

Reference Information

CVE: CVE-2021-4002

USN: 5211-1