Schneider Electric Modicon M340, MC80, and Momentum Unity M1E Authentication Bypass by Spoofing (CVE-2024-8935)

high Tenable OT Security Plugin ID 502688

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability exists that could cause a denial of service and loss of confidentiality and integrity of controllers when conducting a Man-In-The-Middle attack between the controller and the engineering workstation while a valid user is establishing a communication session. This vulnerability is inherent to the Diffie Hellman algorithm which does not protect against Man-In-The-Middle attacks.

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Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 502688

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 11/28/2024

Updated: 11/29/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:schneider-electric:modicon_m340

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 11/12/2024

Vulnerability Publication Date: 11/12/2024

Reference Information

CVE: CVE-2024-8935

CWE: 290

ICSA: 24-326-03

Detections

Analytics