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FreeBSD : FreeBSD -- Remote code execution via ND6 Router Advertisements (6c9318c7-dae9-11f0-80b8-bc241121aa0a)

critical Nessus Plugin ID 279033

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Synopsis

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

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 6c9318c7-dae9-11f0-80b8-bc241121aa0a advisory.

 The rtsol(8) and rtsold(8) programs do not validate the domain search list options provided in router advertisement messages; the option body is passed to resolvconf(8) unmodified.
 resolvconf(8) is a shell script which does not validate its input.
 A lack of quoting meant that shell commands pass as input to resolvconf(8) may be executed.
 Systems running rtsol(8) or rtsold(8) are vulnerable to remote code execution from systems on the same network segment. In particular, router advertisement messages are not routable and should be dropped by routers, so the attack does not cross network boundaries.

Tenable has extracted the preceding description block directly from the FreeBSD 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

Update the affected packages.

See Also

http://www.nessus.org/u?2895a373

Plugin Details

Severity: Critical

ID: 279033

File Name: freebsd_pkg_6c9318c7dae911f080b8bc241121aa0a.nasl

Version: 1.2

Type: local

Published: 12/17/2025

Updated: 2/23/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.0

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

CVSS Score Source: CVE-2025-14558

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd

Required KB Items: Settings/ParanoidReport, Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/17/2025

Vulnerability Publication Date: 12/16/2025

Exploitable With

Metasploit (FreeBSD rtsold/rtsol DNSSL Command Injection)

Reference Information

CVE: CVE-2025-14558