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Debian dla-4585 : firewall-applet - security update

medium Nessus Plugin ID 314978

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4585 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-4585-1 [email protected] https://www.debian.org/lts/security/ Andreas Henriksson May 15, 2026 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : firewalld Version : 0.9.3-2+deb11u1 CVE ID : CVE-2026-4948 Debian Bug :

 A flaw was found in firewalld where a local unprivileged user can modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.

 For Debian 11 bullseye, this problem has been fixed in version 0.9.3-2+deb11u1.

 We recommend that you upgrade your firewalld packages.

 For the detailed security status of firewalld please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/firewalld

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
 signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the firewall-applet packages.

See Also

https://security-tracker.debian.org/tracker/source-package/firewalld

https://security-tracker.debian.org/tracker/CVE-2026-4948

https://packages.debian.org/source/bullseye/firewalld

Plugin Details

Severity: Medium

ID: 314978

File Name: debian_DLA-4585.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/15/2026

Updated: 5/15/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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: p-cpe:/a:debian:debian_linux:firewall-applet, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:firewall-config, p-cpe:/a:debian:debian_linux:python3-firewall, p-cpe:/a:debian:debian_linux:firewalld

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/15/2026

Vulnerability Publication Date: 3/27/2026

Reference Information

CVE: CVE-2026-4948