Detections
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Ubuntu 24.04 LTS / 25.10 : Kea DHCP vulnerability (USN-8403-1)

high Nessus Plugin ID 320409

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 24.04 LTS / 25.10 host has packages installed that are affected by a vulnerability as referenced in the USN-8403-1 advisory.

 Ali Norouzi discovered that Kea DHCP did not properly handle maliciously crafted messages over configured API sockets and HA listeners. A remote attacker could possibly use this issue to cause Kea 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-8403-1

Plugin Details

Severity: High

ID: 320409

File Name: ubuntu_USN-8403-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/11/2026

Updated: 6/11/2026

Supported Sensors: Continuous Assessment, Nessus Agent, 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-2026-3608

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: p-cpe:/a:canonical:ubuntu_linux:python3-kea-connector, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:kea-admin, p-cpe:/a:canonical:ubuntu_linux:kea, p-cpe:/a:canonical:ubuntu_linux:kea-common, p-cpe:/a:canonical:ubuntu_linux:kea-ctrl-agent, p-cpe:/a:canonical:ubuntu_linux:kea-dev, p-cpe:/a:canonical:ubuntu_linux:kea-dhcp4-server, p-cpe:/a:canonical:ubuntu_linux:kea-dhcp-ddns-server, p-cpe:/a:canonical:ubuntu_linux:kea-dhcp6-server

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/8/2026

Vulnerability Publication Date: 3/25/2026

Reference Information

CVE: CVE-2026-3608

USN: 8403-1