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Schneider Electric Modicon Improper Check for Unusual or Exceptional Conditions (CVE-2020-7536)

high Tenable OT Security Plugin ID 501207

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-754:Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M340 CPUs (BMXP34* versions prior to V3.30) Modicon M340 Communication Ethernet modules (BMXNOE0100 (H) versions prior to V3.4 BMXNOE0110 (H) versions prior to V6.6 BMXNOR0200H all versions), that could cause the device to be unreachable when modifying network parameters over SNMP.

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://security.cse.iitk.ac.in/responsible-disclosure

https://www.se.com/ww/en/download/document/SEVD-2020-343-07/

Plugin Details

Severity: High

ID: 501207

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 6/29/2023

Updated: 8/22/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2020-7536

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:schneider-electric:bmxnoe0100_firmware, cpe:/o:schneider-electric:bmxnoe0110_firmware, cpe:/o:schneider-electric:bmxnor0200h_firmware, cpe:/o:schneider-electric:bmxp341000_firmware, cpe:/o:schneider-electric:bmxp342000_firmware, cpe:/o:schneider-electric:bmxp3420102_firmware, cpe:/o:schneider-electric:bmxp3420102cl_firmware, cpe:/o:schneider-electric:bmxp342020_firmware, cpe:/o:schneider-electric:bmxp3420302_firmware, cpe:/o:schneider-electric:bmxp3420302cl_firmware, cpe:/o:schneider-electric:bmxnoc0401_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 12/11/2020

Vulnerability Publication Date: 12/11/2020

Reference Information

CVE: CVE-2020-7536

CWE: 754