Mitsubishi Electric MELSEC iQ-R, Q and L Series Uncontrolled Resource Consumption (CVE-2020-5652)

high Tenable OT Security Plugin ID 500395

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition . 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 users take the following mitigation measures to minimize the risk of exploiting this vulnerability:

- Use a firewall or virtual private network (VPN), etc. to prevent unauthorized access when Internet access is required.
- Use within a LAN and block access from untrusted networks and hosts through firewalls.

Please refer to Mitsubishi Electric's website for details on available patches. Mitsubishi Electric recommends users update their products by downloading and applying the latest versions. Please contact a Mitsubishi Electric representative for additional details.

For specific additional details, see [Mitsubishi Electric advisory 2020-013].(https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-013_en.pdf).

Plugin Details

Severity: High

ID: 500395

Version: 1.7

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 3/4/2024

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-2020-5652

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:melsec_q-q04udpvcpu_firmware:22031, cpe:/o:mitsubishielectric:melsec_q-q06udpvcpu_firmware:22031, cpe:/o:mitsubishielectric:melsec_q-q13udpvcpu_firmware:22031, cpe:/o:mitsubishielectric:melsec_q-q26udpvcpu_firmware:22031, cpe:/o:mitsubishielectric:melsec_q-q03udvcpu_firmware:22031, cpe:/o:mitsubishielectric:melsec_q-q04udvcpu_firmware:22031, cpe:/o:mitsubishielectric:melsec_q-q13udvcpu_firmware:22031, cpe:/o:mitsubishielectric:melsec_q-q26udvcpu_firmware:22031, cpe:/o:mitsubishielectric:melsec_q-q03udecpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_q-q04udehcpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_q-q06udehcpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_q-q10udehcpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_q-q13udehcpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_q-q20udehcpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_q-q26udehcpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_q-q50udehcpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_q-q100udehcpu_firmware:22081, cpe:/o:mitsubishielectric:melsec_iq-r08sfcpu_firmware:22, cpe:/o:mitsubishielectric:melsec_iq-r16sfcpu_firmware:22, cpe:/o:mitsubishielectric:melsec_iq-r32sfcpu_firmware:22, cpe:/o:mitsubishielectric:melsec_iq-r120sfcpu_firmware:22, cpe:/o:mitsubishielectric:melsec_iq-r04encpu_firmware:52, cpe:/o:mitsubishielectric:melsec_iq-r08encpu_firmware:52, cpe:/o:mitsubishielectric:melsec_iq-r16encpu_firmware:52, cpe:/o:mitsubishielectric:melsec_iq-r32encpu_firmware:52, cpe:/o:mitsubishielectric:melsec_iq-r120encpu_firmware:52, cpe:/o:mitsubishielectric:melsec_iq-r00cpu_firmware:20, cpe:/o:mitsubishielectric:melsec_iq-r01cpu_firmware:20, cpe:/o:mitsubishielectric:melsec_iq-r02cpu_firmware:20, cpe:/o:mitsubishielectric:melsec_iq-r08pcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r08psfcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r120pcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r120psfcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r16mtcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r16pcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r16psfcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r32mtcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r32pcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r32psfcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_iq-r64mtcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_l02cpu-p_firmware:-, cpe:/o:mitsubishielectric:melsec_l06cpu-p_firmware:-, cpe:/o:mitsubishielectric:melsec_l26cpu-p_firmware:-, cpe:/o:mitsubishielectric:melsec_l26cpu-pbt_firmware:-, cpe:/o:mitsubishielectric:melsec_q-q170mcpu_firmware:-, cpe:/o:mitsubishielectric:melsec_q-q170mscpu-s1_firmware:-, cpe:/o:mitsubishielectric:melsec_q-q172dcpu-s1_firmware:-, cpe:/o:mitsubishielectric:melsec_q-q172dscpu_firmware:-, cpe:/o:mitsubishielectric:melsec_q-q173dcpu-s1_firmware:-, cpe:/o:mitsubishielectric:melsec_q-q173dscpu_firmware:-, cpe:/o:mitsubishielectric:melsec_q-qmr-mq100_firmware:-

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Patch Publication Date: 11/2/2020

Vulnerability Publication Date: 11/2/2020

Reference Information

CVE: CVE-2020-5652

CWE: 400

Detections

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