Rockwell (CVE-2020-5801)

high Tenable.ot Plugin ID 500442

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An attacker can craft and send an OpenNamespace message to port 4241 with valid session-id that triggers an unhandled exception in CFTLDManager::HandleRequest function in RnaDaSvr.dll, resulting in process termination. Observed in FactoryTalk Linx 6.11. All versions of FactoryTalk Linx are affected.

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

https://www.tenable.com/security/research/tra-2020-71

Plugin Details

Severity: High

ID: 500442

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 2/7/2022

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS Score Source: CVE-2020-5801

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:rockwellautomation:factorytalk_linx

Required KB Items: Tenable.ot/Rockwell

Exploit Ease: No known exploits are available

Patch Publication Date: 12/29/2020

Vulnerability Publication Date: 12/29/2020

Reference Information

CVE: CVE-2020-5801

CWE: 755