FreeBSD : rclone -- Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation (0f3342e3-73ba-11f1-910d-3c7c3fba4204)

critical Nessus Plugin ID 323939

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 0f3342e3-73ba-11f1-910d-3c7c3fba4204 advisory.

https://github.com/rclone/rclone/security/advisories/GHSA-qw24-gh76-8rvv reports:
Rclone is a command-line program to sync files and directories to and from different cloud storage providers.From 1.46.0 until 1.74.3, rclone rcd --rc-serve accepts unauthenticated GET and HEAD requests to paths of the form: /[remote:path]/object.The remote value is parsed from the URL and passed to normal backend initialization.
Inline remote configuration can set backend options that execute local commands during initialization.As a result, a single unauthenticated GET or HEAD request can execute a command as the rclone process user.
Thanks to Nick Craig-Wood for reporting this vulnerability.

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: 323939

File Name: freebsd_pkg_0f3342e373ba11f1910d3c7c3fba4204.nasl

Version: 1.1

Type: Local

Family: FreeBSD Local Security Checks

Published: 6/30/2026

Updated: 6/30/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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-2026-49980

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:rclone, 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: 6/29/2026

Vulnerability Publication Date: 6/16/2026

Reference Information

CVE: CVE-2026-49980

IAVB: 2026-B-0163

Detections

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