FreeBSD : openvpn-devel -- script injection vulnerability from trusted but malicious server (e5cf9f44-9a64-11f0-8241-93c889bb8de1)

critical Nessus Plugin ID 265999

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 e5cf9f44-9a64-11f0-8241-93c889bb8de1 advisory.

Gert Doering reports:
Notable changes beta1 -> beta2 are: [...] add proper input sanitation to DNS strings to prevent an attack coming from a trusted-but-malicous OpenVPN server (CVE: 2025-10680, affects unixoid systems with --dns-updown scripts and windows using the built-in powershell call)

Lev Stipakov writes:
On Linux (and similar platforms), those options are written to a tmp file, which is later sourced by a script running as root. Since options are controlled by the server, it is possible for a malicious server to execute script injection attack [...].
The original report is credited to Stanislav Fort <[email protected]>.

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.

Plugin Details

Severity: Critical

ID: 265999

File Name: freebsd_pkg_e5cf9f449a6411f0824193c889bb8de1.nasl

Version: 1.1

Type: local

Family: FreeBSD Local Security Checks

Published: 9/26/2025

Updated: 9/26/2025

Supported Sensors: Nessus

Risk Information

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2025-10680

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: p-cpe:/a:freebsd:freebsd:openvpn-devel, cpe:/o:freebsd:freebsd

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/25/2025

Vulnerability Publication Date: 9/24/2025

Reference Information

CVE: CVE-2025-10680

Detections

Analytics