Schneider Electric Modicon Weak Password Recovery Mechanism for Forgotten Password (CVE-2018-7811)

critical Tenable OT Security Plugin ID 500276

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An Unverified Password Change vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 which could allow an unauthenticated remote user to access the change password function of the web server

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: 500276

Version: 1.6

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 11/30/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2018-7811

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:modicom_premium_firmware, cpe:/o:schneider-electric:modicom_bmxnor0200_firmware, cpe:/o:schneider-electric:modicom_bmxnor0200h_firmware, cpe:/o:schneider-electric:modicom_quantum_firmware, cpe:/o:schneider-electric:modicom_m340_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/30/2018

Vulnerability Publication Date: 11/30/2018

Reference Information

CVE: CVE-2018-7811

CWE: 640

Detections

Analytics