Mitsubishi Electric MELSEC iQ-R, iQ-F, Q, L and FX Series CPU Modules Cleartext Transmission of Sensitive Information (CVE-2020-5594)

critical Tenable OT Security Plugin ID 500501

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Mitsubishi Electric MELSEC iQ-R, iQ-F, Q, L, and FX series CPU modules all versions contain a vulnerability that allows cleartext transmission of sensitive information between CPU modules and GX Works3 and/or GX Works2 via unspecified vectors.

This plugin only works with Tenable.ot. Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

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

Mitsubishi Electric recommends encrypting the communication path by setting up a VPN to mitigate the impact of this vulnerability.

Additional information about the vulnerability is available by contacting a Mitsubishi Electric representative.https://us.mitsubishielectric.com/fa/en/about-us/distributors

Plugin Details

Severity: Critical

ID: 500501

Version: 1.9

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2020-5594

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:mitsubishielectric:melsec_iq-r_firmware, cpe:/o:mitsubishielectric:melsec_iq-f_firmware, cpe:/o:mitsubishielectric:melsec-q_firmware, cpe:/o:mitsubishielectric:melsec-l_firmware, cpe:/o:mitsubishielectric:melsec-fx_firmware

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Patch Publication Date: 6/23/2020

Vulnerability Publication Date: 6/23/2020

Reference Information

CVE: CVE-2020-5594

CWE: 319

Detections

Analytics