Mitsubishi IU1 Improper Restriction of Operations within the Bounds of a Memory Buffer (CVE-2020-5542)

critical Tenable OT Security Plugin ID 500587

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Buffer error vulnerability in TCP function included in the firmware of Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier allows remote attackers to stop the network functions or execute malware via a specially crafted packet.

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: Critical

ID: 500587

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 11/13/2023

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-2020-5542

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:iu1-1m20-d_firmware

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Patch Publication Date: 3/16/2020

Vulnerability Publication Date: 3/16/2020

Reference Information

CVE: CVE-2020-5542

CWE: 119

Detections

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