Mitsubishi Electric MELSEC-Q Series and MELSEC-L Series CPU Modules Uncontrolled Resource Consumption (CVE-2019-13555)

medium Tenable OT Security Plugin ID 500350

Synopsis

The remote OT asset is affected by a vulnerability.

Description

In Mitsubishi Electric MELSEC-Q Series Q03/04/06/13/26UDVCPU: serial number 21081 and prior, Q04/06/13/26UDPVCPU: serial number 21081 and prior, and Q03UDECPU, Q04/06/10/13/20/26/50/100UDEHCPU: serial number 21081 and prior, MELSEC-L Series L02/06/26CPU, L26CPU-BT: serial number 21101 and prior, L02/06/26CPU-P, L26CPU-PBT: serial number 21101 and prior, and L02/06/26CPU-CM, L26CPU-BT-CM: serial number 21101 and prior, a remote attacker can cause the FTP service to enter a denial-of-service condition dependent on the timing at which a remote attacker connects to the FTP server on the above CPU modules.

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 that users should operate the affected device behind a firewall.

Plugin Details

Severity: Medium

ID: 500350

Version: 1.8

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2019-13555

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/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:l26cpu-bt_firmware, cpe:/o:mitsubishielectric:q13udehcpu_firmware, cpe:/o:mitsubishielectric:q20udehcpu_firmware, cpe:/o:mitsubishielectric:q06udehcpu_firmware, cpe:/o:mitsubishielectric:l26cpu-bt-cm_firmware, cpe:/o:mitsubishielectric:q06udpvcpu_firmware, cpe:/o:mitsubishielectric:q26udehcpu_firmware, cpe:/o:mitsubishielectric:l06cpu-p_firmware, cpe:/o:mitsubishielectric:l26cpu-pbt_firmware, cpe:/o:mitsubishielectric:q100udehcpu_firmware, cpe:/o:mitsubishielectric:l02cpu_firmware, cpe:/o:mitsubishielectric:l26cpu-p_firmware, cpe:/o:mitsubishielectric:l26cpu-cm_firmware, cpe:/o:mitsubishielectric:q13udpvcpu_firmware, cpe:/o:mitsubishielectric:q10udehcpu_firmware, cpe:/o:mitsubishielectric:q50udehcpu_firmware, cpe:/o:mitsubishielectric:l06cpu_firmware, cpe:/o:mitsubishielectric:q04udvcpu_firmware, cpe:/o:mitsubishielectric:l26cpu_firmware, cpe:/o:mitsubishielectric:q03udecpu_firmware, cpe:/o:mitsubishielectric:q03udvcpu_firmware, cpe:/o:mitsubishielectric:q13udvcpu_firmware, cpe:/o:mitsubishielectric:l02cpu-cm_firmware, cpe:/o:mitsubishielectric:q26udvcpu_firmware, cpe:/o:mitsubishielectric:l06cpu-cm_firmware, cpe:/o:mitsubishielectric:q06udvcpu_firmware, cpe:/o:mitsubishielectric:q04udpvcpu_firmware, cpe:/o:mitsubishielectric:q26udpvcpu_firmware, cpe:/o:mitsubishielectric:q04udehcpu_firmware, cpe:/o:mitsubishielectric:l02cpu-p_firmware

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Patch Publication Date: 11/13/2019

Vulnerability Publication Date: 11/13/2019

Reference Information

CVE: CVE-2019-13555

CWE: 400

ICSA: 19-311-01

Detections

Analytics