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Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Unbound vulnerability (USN-5732-1)

high Nessus Plugin ID 167865

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5732-1 advisory.

 It was discovered that Unbound incorrectly handled delegations with a large number of non-responsive nameservers. A remote attacker could possibly use this issue to cause Unbound to consume resources, leading to 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-5732-1

Plugin Details

Severity: High

ID: 167865

File Name: ubuntu_USN-5732-1.nasl

Version: 1.7

Type: local

Agent: unix

Published: 11/18/2022

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: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2022-3204

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:python-unbound, p-cpe:/a:canonical:ubuntu_linux:unbound-anchor, p-cpe:/a:canonical:ubuntu_linux:libunbound-dev, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:python3-unbound, p-cpe:/a:canonical:ubuntu_linux:unbound, p-cpe:/a:canonical:ubuntu_linux:unbound-host, p-cpe:/a:canonical:ubuntu_linux:libunbound2, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libunbound8

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/17/2022

Vulnerability Publication Date: 9/26/2022

Reference Information

CVE: CVE-2022-3204

USN: 5732-1