Detections
Analytics

Fedora 43 : perl-Net-DNS (2026-1237afef8a)

critical Nessus Plugin ID 344482

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1237afef8a advisory.

 Update to Net-DNS 1.56 (from 1.53).

 Security fixes:
 - CVE-worthy: Remote code injection via EDNS EXTENDED ERROR (rt.cpan #179945)
 - Denial of Service via long DNS compression chains (rt.cpan #179946)
 - Resolver/UNIX.pm no longer relies on shell for `uname` (rt.cpan #176900)

 Bug fixes:
 - Fix TCP read loop treating 1-byte recv() of 0 (0x30) as EOF, which corrupted AXFRs (rt.cpan #177003)
 - Fix unhelpful TAINT error (rt.cpan #178183)
 - Fix unreachable-code warning under Apache/mod_perl (rt.cpan #179692/#176900)
 - Documentation fix for Net::DNS::RR::RRSIG::verify() (rt.cpan #180088).

 Other:
 - Resync with IANA DNS parameters and DNSSEC algorithm registries
 - New DNSKEY adt() accessor; DELEG parser backported to SVCB

Tenable has extracted the preceding description block directly from the Fedora 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

Update the affected perl-Net-DNS package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-1237afef8a

Plugin Details

Severity: Critical

ID: 344482

File Name: fedora_2026-1237afef8a.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/10/2026

Updated: 9/10/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.13

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-64193

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:fedoraproject:fedora:43, p-cpe:/a:fedoraproject:fedora:perl-net-dns

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/1/2026

Vulnerability Publication Date: 7/20/2026

Reference Information

CVE: CVE-2026-64193, CVE-2026-64194