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Ubuntu 18.04 LTS / 20.04 LTS : DHCP vulnerability (USN-4969-1)

high Nessus Plugin ID 150030

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4969-1 advisory.

 Jon Franklin and Pawel Wieczorkiewicz discovered that DHCP incorrectly handled lease file parsing. A remote attacker could possibly use this issue to cause DHCP 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-4969-1

Plugin Details

Severity: High

ID: 150030

File Name: ubuntu_USN-4969-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 5/27/2021

Updated: 8/27/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.6

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

CVSS Score Source: CVE-2021-25217

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:isc-dhcp-client, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:isc-dhcp-relay, p-cpe:/a:canonical:ubuntu_linux:isc-dhcp-common, p-cpe:/a:canonical:ubuntu_linux:isc-dhcp-client-udeb, p-cpe:/a:canonical:ubuntu_linux:isc-dhcp-client-ddns, p-cpe:/a:canonical:ubuntu_linux:isc-dhcp-server, p-cpe:/a:canonical:ubuntu_linux:isc-dhcp-server-ldap, p-cpe:/a:canonical:ubuntu_linux:isc-dhcp-dev

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: 5/27/2021

Vulnerability Publication Date: 5/26/2021

Reference Information

CVE: CVE-2021-25217

USN: 4969-1