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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.

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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.

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

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

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

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: Medium

Score: 4.4

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