Schneider Electric Modicon Improper Handling of Exceptional Conditions (CVE-2019-6843)

medium Tenable OT Security Plugin ID 500193

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 with firmware (version prior to V3.10), Modicon M340 (all firmware versions), and Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service attack on the PLC when upgrading the controller with an empty firmware package using FTP protocol.

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: Medium

ID: 500193

Version: 1.7

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 1/24/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2019-6843

CVSS v3

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 4.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/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:modicon_140cra_firmware, cpe:/o:schneider-electric:modicon_bmxcra_firmware, cpe:/o:schneider-electric:modicon_m340_series_firmware, cpe:/o:schneider-electric:modicon_m580_series_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 10/29/2019

Vulnerability Publication Date: 10/29/2019

Reference Information

CVE: CVE-2019-6843

CWE: 755

Detections

Analytics