Detections
Analytics

Mitsubishi Electric MELSEC-Q Series PLCs Uncontrolled Resource Consumption (CVE-2019-6535)

high Tenable OT Security Plugin ID 500066

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Mitsubishi Electric Q03/04/06/13/26UDVCPU: serial number 20081 and prior, Q04/06/13/26UDPVCPU: serial number 20081 and prior, and Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU: serial number 20101 and prior. A remote attacker can send specific bytes over Port 5007 that will result in an Ethernet stack crash and disruption to USB communication.

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 has produced a new version of the firmware. Additional information about this vulnerability or Mitsubishi Electric's compensating control is available by contacting a local Mitsubishi Electric representative, which can be found at the following location: https://us.mitsubishielectric.com/fa/en/about-us/distributors

Mitsubishi Electric strongly recommends users should operate the affected device behind a firewall.

See Also

https://ics-cert.us-cert.gov/advisories/ICSA-19-029-02

https://www.cisa.gov/news-events/ics-advisories/icsa-19-029-02

http://www.securityfocus.com/bid/106771

Plugin Details

Severity: High

ID: 500066

Version: 1.16

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 6/27/2025

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-2019-6535

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:mitsubishielectric:q06udehcpu_firmware, cpe:/o:mitsubishielectric:q50udehcpu_firmware, cpe:/o:mitsubishielectric:q26udvcpu_firmware, cpe:/o:mitsubishielectric:q13udvcpu_firmware, cpe:/o:mitsubishielectric:q06udvcpu_firmware, cpe:/o:mitsubishielectric:q06udpvcpu_firmware, cpe:/o:mitsubishielectric:q26udehcpu_firmware, cpe:/o:mitsubishielectric:q20udehcpu_firmware, cpe:/o:mitsubishielectric:q04udehcpu_firmware, cpe:/o:mitsubishielectric:q04udvcpu_firmware, cpe:/o:mitsubishielectric:q04udpvcpu_firmware, cpe:/o:mitsubishielectric:q100udehcpu_firmware, cpe:/o:mitsubishielectric:q03udecpu_firmware, cpe:/o:mitsubishielectric:q26udpvcpu_firmware, cpe:/o:mitsubishielectric:q13udehcpu_firmware, cpe:/o:mitsubishielectric:q03udvcpu_firmware, cpe:/o:mitsubishielectric:q13udpvcpu_firmware, cpe:/o:mitsubishielectric:q10udehcpu_firmware

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Patch Publication Date: 2/5/2019

Vulnerability Publication Date: 2/5/2019

Reference Information

CVE: CVE-2019-6535

CWE: 400

ICSA: 19-029-02