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Ubuntu 16.04 ESM / 18.04 LTS : Linux kernel vulnerability (USN-5014-1)

high Nessus Plugin ID 153130

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 ESM / 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-5014-1 advisory.

 - fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05. (CVE-2021-33909)

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-5014-1

Plugin Details

Severity: High

ID: 153130

File Name: ubuntu_USN-5014-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 9/8/2021

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: Critical

Score: 9.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2021-33909

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1095-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1130-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-212-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-212-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1042-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1045-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-76-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-76-lowlatency

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: 7/20/2021

Vulnerability Publication Date: 7/20/2021

Reference Information

CVE: CVE-2021-33909

IAVA: 2021-A-0350

USN: 5014-1