Schneider Electric Modicon Ethernet Serial RTU Improper Check For Unusual or Exceptional Conditions (CVE-2019-6831)

high Tenable OT Security Plugin ID 501214

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in BMXNOR0200H Ethernet / Serial RTU module (all firmware versions), which could cause disconnection of active connections when an unusually high number of IEC 60870- 5-104 packets are received by the module on port 2404/TCP.

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Solution

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

Schneider Electric recommends users set up network segmentation and implement a firewall to block all unauthorized access to Port 2404/TCP and SNMP Port 161/UDP.

For more information, see the Schneider Electric security notification.

Plugin Details

Severity: High

ID: 501214

Version: 1.6

Type: remote

Family: Tenable.ot

Published: 6/29/2023

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2019-6831

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: cpe:/o:schneider-electric:bmxnor0200h_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 9/17/2019

Vulnerability Publication Date: 9/17/2019

Reference Information

CVE: CVE-2019-6831

CWE: 754

ICSA: 20-044-01

Detections

Analytics