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Ubuntu 20.04 LTS : PolicyKit vulnerability (USN-5304-1)

medium Nessus Plugin ID 158455

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5304-1 advisory.

 Kevin Backhouse discovered that PolicyKit incorrectly handled file descriptors. A local attacker could possibly use this issue to cause PolicyKit to crash, resulting in a denial of service.

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 packages.

See Also

https://ubuntu.com/security/notices/USN-5304-1

Plugin Details

Severity: Medium

ID: 158455

File Name: ubuntu_USN-5304-1.nasl

Version: 1.7

Type: local

Agent: unix

Published: 2/28/2022

Updated: 8/29/2024

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: 4.4

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2021-4115

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:gir1.2-polkit-1.0, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libpolkit-gobject-1-0, p-cpe:/a:canonical:ubuntu_linux:libpolkit-agent-1-dev, p-cpe:/a:canonical:ubuntu_linux:libpolkit-agent-1-0, p-cpe:/a:canonical:ubuntu_linux:libpolkit-gobject-1-dev, p-cpe:/a:canonical:ubuntu_linux:policykit-1

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/28/2022

Vulnerability Publication Date: 2/21/2022

Reference Information

CVE: CVE-2021-4115

USN: 5304-1