Schneider Electric Modicon Exposure of Sensitive Information to an Unauthorized Actor (CVE-2018-7812)

high Tenable OT Security Plugin ID 500299

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An Information Exposure through Discrepancy vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where the web server sends different responses in a way that exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

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: High

ID: 500299

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: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2018-7812

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:H/I:N/A:N

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

Vulnerability Information

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

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 12/17/2018

Vulnerability Publication Date: 12/17/2018

Reference Information

CVE: CVE-2018-7812

CWE: 200

Detections

Analytics