Detections
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CentOS 9 : firewalld-1.3.4-20.el9

medium Nessus Plugin ID 331919

Synopsis

The remote CentOS host is missing a security update for firewall-applet.

Description

The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the firewalld-1.3.4-20.el9 build changelog.

 - A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations. (CVE-2026-4948)

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 CentOS 9 Stream firewall-applet package.

See Also

https://kojihub.stream.centos.org/koji/buildinfo?buildID=123218

Plugin Details

Severity: Medium

ID: 331919

File Name: centos9_firewalld-1_3_4-20_123218.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 8/4/2026

Updated: 8/4/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.68

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-4948

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: cpe:/a:centos:centos:9, p-cpe:/a:centos:centos:firewall-applet, p-cpe:/a:centos:centos:firewall-config, p-cpe:/a:centos:centos:firewalld-filesystem, p-cpe:/a:centos:centos:firewalld, p-cpe:/a:centos:centos:python3-firewall

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 7/30/2026

Vulnerability Publication Date: 3/27/2026

Reference Information

CVE: CVE-2026-4948