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FreeBSD : traefik -- Inverted TLS Verification Logic in Kubernetes NGINX Provider (dc7e30db-de67-11f0-b893-5404a68ad561)

medium Nessus Plugin ID 279498

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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 dc7e30db-de67-11f0-b893-5404a68ad561 advisory.

 The traefik project reports:

 There is a potential vulnerability in Traefik NGINX provider managing the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation.
 The provider inverts the semantics of the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation.
 Setting the annotation to on (intending to enable backend TLS certificate verification) actually disables verification, allowing man-in-the-middle attacks against HTTPS backends when operators believe they are 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.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2025-66491

http://www.nessus.org/u?df625a8e

Plugin Details

Severity: Medium

ID: 279498

File Name: freebsd_pkg_dc7e30dbde6711f0b8935404a68ad561.nasl

Version: 1.1

Type: local

Published: 12/21/2025

Updated: 12/21/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2025-66491

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:traefik

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/21/2025

Vulnerability Publication Date: 12/8/2025

Reference Information

CVE: CVE-2025-66491

IAVB: 2025-B-0202