Schneider Electric Modicon Authentication Bypass by Spoofing (CVE-2018-7842)

critical Tenable OT Security Plugin ID 500122

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-290: Authentication Bypass by Spoofing vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause an elevation of privilege by conducting a brute force attack on Modbus parameters sent to the controller.

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.

Plugin Details

Severity: Critical

ID: 500122

Version: 1.6

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 1/24/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2018-7842

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: cpe:/o:schneider-electric:modicon_m580_series_firmware, cpe:/o:schneider-electric:modicon_m340_series_firmware, cpe:/o:schneider-electric:modicon_quantum_firmware, cpe:/o:schneider-electric:modicon_premium_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/22/2019

Vulnerability Publication Date: 5/22/2019

Reference Information

CVE: CVE-2018-7842

CWE: 290

Detections

Analytics