Debian dsa-6511 : znc - security update

critical Nessus Plugin ID 349557

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6511 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6511-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff September 23, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : znc CVE ID : CVE-2026-82373 CVE-2026-82374

Two security vulnerabilities were discovered in the ZNC IRC bouncer, which could result in denial of service.

For the stable distribution (trixie), these problems have been fixed in version 1.9.1-2+deb13u1.

We recommend that you upgrade your znc packages.

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

Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the znc packages.

Plugin Details

Severity: Critical

ID: 349557

File Name: debian_DSA-6511.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 9/23/2026

Updated: 9/23/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.28

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2026-82374

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:znc-backlog, p-cpe:/a:debian:debian_linux:znc-dev, p-cpe:/a:debian:debian_linux:znc-perl, p-cpe:/a:debian:debian_linux:znc-push, p-cpe:/a:debian:debian_linux:znc-python, p-cpe:/a:debian:debian_linux:znc-tcl, p-cpe:/a:debian:debian_linux:znc

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/23/2026

Vulnerability Publication Date: 9/13/2026

Reference Information

CVE: CVE-2026-82373, CVE-2026-82374

Detections

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