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Debian dla-4529 : bind9 - security update

high Nessus Plugin ID 307627

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-4529 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4529-1 [email protected] https://www.debian.org/lts/security/ Bastien Roucaris April 13, 2026 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : bind9 Version : 1:9.16.50-1~deb11u5 CVE ID : CVE-2026-1519

 BIND a popular name server (DNS) was affected by a vulnerability.

 If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU.

 Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries

 For Debian 11 bullseye, this problem has been fixed in version 1:9.16.50-1~deb11u5.

 We recommend that you upgrade your bind9 packages.

 For the detailed security status of bind9 please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/bind9

 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

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 bind9 packages.

See Also

https://security-tracker.debian.org/tracker/source-package/bind9

https://security-tracker.debian.org/tracker/CVE-2026-1519

https://packages.debian.org/source/bullseye/bind9

Plugin Details

Severity: High

ID: 307627

File Name: debian_DLA-4529.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/20/2026

Updated: 4/20/2026

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-2026-1519

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:debian:debian_linux:bind9utils, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:dnsutils, p-cpe:/a:debian:debian_linux:bind9-host, p-cpe:/a:debian:debian_linux:bind9-dnsutils, p-cpe:/a:debian:debian_linux:bind9, p-cpe:/a:debian:debian_linux:bind9-utils, p-cpe:/a:debian:debian_linux:bind9-libs, p-cpe:/a:debian:debian_linux:bind9-doc, p-cpe:/a:debian:debian_linux:bind9-dev

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/13/2026

Vulnerability Publication Date: 3/25/2026

Reference Information

CVE: CVE-2026-1519

IAVA: 2026-A-0269