Debian dsa-6421 : pdns-recursor - security update

high Nessus Plugin ID 333529

Synopsis

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

Description

The remote Debian 13 host has a package installed that is affected by a vulnerability as referenced in the dsa-6421 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6421-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso August 08, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : pdns-recursor CVE ID : CVE-2026-52682

A vulnerability was discovered in PowerDNS Recursor (pdns-recursor), a resolving name server, which may result in denial of service (increased memory and CPU usage) when processing a specially crafted DNS packet.

For the stable distribution (trixie), this problem has been fixed in version 5.2.13-0+deb13u1.

We recommend that you upgrade your pdns-recursor packages.

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

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 this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the pdns-recursor packages.

Plugin Details

Severity: High

ID: 333529

File Name: debian_DSA-6421.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 8/8/2026

Updated: 8/8/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.76

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-52682

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: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:pdns-recursor

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/8/2026

Vulnerability Publication Date: 8/7/2026

Reference Information

CVE: CVE-2026-52682

Detections

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