Schneider Electric Modicon Controllers Improper Check For Unusual or Exceptional Conditions (CVE-2019-6857)

high Tenable OT Security Plugin ID 500347

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium (see security notification for specific versions) which could cause a Denial of Service of the controller when reading specific memory blocks using Modbus TCP.

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Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Schneider Electric has developed the following mitigations: Specific Modicon M580 firmware v3.10 is available at:

- BMEP584040
- BMEH584040 and C
- BMEP586040 and C
- BMEH586040 and C
- BMEP581020 and H
- BMEP582020 and H
- BMEP582040 and H
- BMEP583020
- BMEP583040
- BMEP584020
- BMEP585040 and C
- BMEH582040 and C
- BMEP584040S
- BMEH584040S
- BMEH586040S
- BMEP582040S

Modicon M340 firmware v3.20 is available at:

- BMXP3420302 and CL and H
- BMXP342020 and H
- BMXP342000
- BMXP341000 and H
- BMXP3420102 and CL
- BMXP3420302

Modicon Premium v3.20 firmware is available by contacting Schneider Electric customer support. Modicon Quantum firmware v3.60 is available at:

See Also

https://www.se.com/ww/en/download/document/SEVD-2019-344-01

https://www.us-cert.gov/ics/advisories/icsa-20-016-01

Plugin Details

Severity: High

ID: 500347

Version: 1.7

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 3/4/2024

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:N/I:N/A:P

CVSS Score Source: CVE-2019-6857

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:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/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_premium_firmware, cpe:/o:schneider-electric:modicon_quantum_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 1/6/2020

Vulnerability Publication Date: 1/6/2020

Reference Information

CVE: CVE-2019-6857

CWE: 754