B&R Automation Studio and Automation Runtime Improper Authorization (CVE-2019-19108)

critical Tenable OT Security Plugin ID 503273

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An authentication weakness in the SNMP service in B&R Automation Runtime versions 2.96, 3.00, 3.01, 3.06 to 3.10, 4.00 to 4.63, 4.72 and above allows unauthenticated users to modify the configuration of B&R products via SNMP.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

B&R reports product-technical reasons disallow the changing of SNMP credentials. To reduce risk from this vulnerability, the following Automation Studio versions disable the SNMP service by default in newly created AS projects:

- AS 4.6.5 (Planned release date: 2020-03-27) and higher
- AS 4.7.3 (Planned release date: 2020-04-10) and higher
- AS 4.8.2 (Planned release date: 2020-06-11) and higher

B&R reports the above-mentioned dates denoted as planned are preliminary and may be subject to change. Registered users may approach their local B&R service organization in case of questions. B&R recommends that affected users evaluate their need for the SNMP service and disable it if possible. For more information related to this vulnerability please refer to the B&R advisory. For additional information and support, please contact B&R service.

Plugin Details

Severity: Critical

ID: 503273

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 6/13/2025

Updated: 6/13/2025

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: High

Base Score: 7.5

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

CVSS Score Source: CVE-2019-19108

CVSS v3

Risk Factor: Critical

Base Score: 9.4

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

Vulnerability Information

CPE: cpe:/a:br-automation:automation_runtime:3.01, cpe:/a:br-automation:automation_runtime:3.00, cpe:/a:br-automation:automation_runtime:4, cpe:/a:br-automation:automation_runtime:4.72, cpe:/a:br-automation:automation_runtime:3.06, cpe:/a:br-automation:automation_runtime:2.96, cpe:/a:br-automation:automation_runtime:3.07, cpe:/a:br-automation:automation_runtime:3

Required KB Items: Tenable.ot/BRAutomation

Exploit Ease: No known exploits are available

Patch Publication Date: 4/20/2020

Vulnerability Publication Date: 4/20/2020

Reference Information

CVE: CVE-2019-19108

CWE: 285

ICSA: 20-051-01

Detections

Analytics