Detections
Analytics

Mitsubishi Electric MELSEC Uncontrolled Resource Consumption (CVE-2020-5527)

high Tenable OT Security Plugin ID 500364

Synopsis

The remote OT asset is affected by a vulnerability.

Description

When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the data properly. As a result, it may fall into a denial-of-service (DoS) condition. The vendor states this vulnerability only affects Ethernet communication functions.

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.

In the user manual for this device, Mitsubishi Electric recommends implementing one or both of the following:

- Install a firewall.
- Use the IP filter function to restrict the connectable IP addresses.

Additional information about the vulnerability is available by contacting a Mitsubishi Electric representative.

See Also

https://jvn.jp/en/vu/JVNVU91553662/index.html

https://www.cisa.gov/news-events/ics-advisories/icsa-20-091-02

http://www.nessus.org/u?06dadf59

Plugin Details

Severity: High

ID: 500364

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: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-5527

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:q24dhccpu-v_firmware:-, cpe:/o:mitsubishielectric:l02scpu_firmware:-, cpe:/o:mitsubishielectric:q25prhcpu_firmware:-, cpe:/o:mitsubishielectric:r04encpu_firmware:-, cpe:/o:mitsubishielectric:l02cpu-p_firmware:-, cpe:/o:mitsubishielectric:q26dhccpu-ls_firmware:-, cpe:/o:mitsubishielectric:l02cpu_firmware:-, cpe:/o:mitsubishielectric:fx5u_firmware:-, cpe:/o:mitsubishielectric:q173dscpu_firmware:-, cpe:/o:mitsubishielectric:fx5uc_firmware:-, cpe:/o:mitsubishielectric:q25phcpu_firmware:-, cpe:/o:mitsubishielectric:q24dhccpu-vg2_firmware:-, cpe:/o:mitsubishielectric:r08cpu_firmware:-, cpe:/o:mitsubishielectric:q02phcpu_firmware:-, cpe:/o:mitsubishielectric:r120cpu_firmware:-, cpe:/o:mitsubishielectric:q12dccpu-v_firmware:-, cpe:/o:mitsubishielectric:l26cpu-bt_firmware:-, cpe:/o:mitsubishielectric:r32encpu_firmware:-, cpe:/o:mitsubishielectric:r08encpu_firmware:-, cpe:/o:mitsubishielectric:l26cpu_firmware:-, cpe:/o:mitsubishielectric:fx3u_firmware:-, cpe:/o:mitsubishielectric:r00cpu_firmware:-, cpe:/o:mitsubishielectric:r02cpu_firmware:-, cpe:/o:mitsubishielectric:l02scpu-p_firmware:-, cpe:/o:mitsubishielectric:l06cpu_firmware:-, cpe:/o:mitsubishielectric:fx3gc_firmware:-, cpe:/o:mitsubishielectric:fx5uj_firmware:-, cpe:/o:mitsubishielectric:fx3g_firmware:-, cpe:/o:mitsubishielectric:q06phcpu_firmware:-, cpe:/o:mitsubishielectric:r04cpu_firmware:-, cpe:/o:mitsubishielectric:l26cpu-pbt_firmware:-, cpe:/o:mitsubishielectric:q12prhcpu_firmware:-, cpe:/o:mitsubishielectric:r120encpu_firmware:-, cpe:/o:mitsubishielectric:q172dscpu_firmware:-, cpe:/o:mitsubishielectric:r16cpu_firmware:-, cpe:/o:mitsubishielectric:r01cpu_firmware:-, cpe:/o:mitsubishielectric:q12phcpu_firmware:-, cpe:/o:mitsubishielectric:q24dhccpu-ls_firmware:-, cpe:/o:mitsubishielectric:q173nccpu_firmware:-, cpe:/o:mitsubishielectric:fx3uc_firmware:-, cpe:/o:mitsubishielectric:r32cpu_firmware:-, cpe:/o:mitsubishielectric:r16encpu_firmware:-, cpe:/o:mitsubishielectric:l06cpu-p_firmware:-, cpe:/o:mitsubishielectric:l26cpu-p_firmware:-, cpe:/o:mitsubishielectric:fx3s_firmware:-

Required KB Items: Tenable.ot/Mitsubishi

Exploit Ease: No known exploits are available

Patch Publication Date: 3/30/2020

Vulnerability Publication Date: 3/30/2020

Reference Information

CVE: CVE-2020-5527

CWE: 400

ICSA: 20-091-02