Detections
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Schneider Electric Modicon Improper Check for Unusual or Exceptional Conditions (CVE-2020-7539)

high Tenable OT Security Plugin ID 501217

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.

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.

See Also

https://www.se.com/ww/en/download/document/SEVD-2020-343-03/

Plugin Details

Severity: High

ID: 501217

Version: 1.3

Type: remote

Family: Tenable.ot

Published: 6/29/2023

Updated: 4/11/2024

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-2020-7539

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:tsxety4103_firmware, cpe:/o:schneider-electric:tsxety5103_firmware, cpe:/o:schneider-electric:tsxp574634_firmware, cpe:/o:schneider-electric:tsxp575634_firmware, cpe:/o:schneider-electric:140cpu65150_firmware, cpe:/o:schneider-electric:140noc77101_firmware, cpe:/o:schneider-electric:140noc78000_firmware, cpe:/o:schneider-electric:140noc78100_firmware, cpe:/o:schneider-electric:140noe77111_firmware, cpe:/o:schneider-electric:bmxnoc0401_firmware, cpe:/o:schneider-electric:bmxnoe0100_firmware, cpe:/o:schneider-electric:bmxnoe0110_firmware, cpe:/o:schneider-electric:bmxp341000_firmware, cpe:/o:schneider-electric:bmxp342000_firmware, cpe:/o:schneider-electric:bmxp3420102_firmware, cpe:/o:schneider-electric:bmxp3420102cl_firmware, cpe:/o:schneider-electric:bmxp342020_firmware, cpe:/o:schneider-electric:bmxp3420302_firmware, cpe:/o:schneider-electric:bmxp3420302cl_firmware, cpe:/o:schneider-electric:tsxp576634_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 12/11/2020

Vulnerability Publication Date: 12/11/2020

Reference Information

CVE: CVE-2020-7539

CWE: 754