Detections
Analytics

B&R Automation Runtime Missing Release of Memory after Effective Lifetime (CVE-2020-11637)

high Tenable OT Security Plugin ID 503268

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A memory leak in the TFTP service in B&R Automation Runtime versions <N4.26, <N4.34, <F4.45, <E4.53, <D4.63, <A4.73 and prior could allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition.

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

Solution

Refer to the vendor advisory.

See Also

http://www.nessus.org/u?d2eacb6a

Plugin Details

Severity: High

ID: 503268

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 6/13/2025

Updated: 6/13/2025

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS Score Source: CVE-2020-11637

CVSS v3

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: cpe:/a:br-automation:automation_runtime:n4, cpe:/a:br-automation:automation_runtime:f4, cpe:/a:br-automation:automation_runtime:4, cpe:/a:br-automation:automation_runtime:e4, cpe:/a:br-automation:automation_runtime:d4, cpe:/a:br-automation:automation_runtime:a4

Required KB Items: Tenable.ot/BRAutomation

Exploit Ease: No known exploits are available

Patch Publication Date: 10/15/2020

Vulnerability Publication Date: 10/15/2020

Reference Information

CVE: CVE-2020-11637

CWE: 401