PT-2020-18631 · Mitsubishi · Melsec Iq-R Series Cpu Modules

Published 2020-11-16 · Updated 2020-12-03 · CVE-2020-5666

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions MELSEC iQ-R Series CPU Modules R00/01/02CPU versions 05 through 19 MELSEC iQ-R Series CPU Modules R04/08/16/32/120(EN)CPU versions 35 through 51

Description The issue allows a remote attacker to cause an error in a CPU unit via a specially crafted HTTP packet. This may lead to a denial-of-service (DoS) condition, affecting the execution of the program and its communication.

Recommendations For MELSEC iQ-R Series CPU Modules R00/01/02CPU versions 05 through 19, update the firmware to a version outside of the affected range. For MELSEC iQ-R Series CPU Modules R04/08/16/32/120(EN)CPU versions 35 through 51, update the firmware to a version outside of the affected range. As a temporary workaround, consider restricting access to the HTTP endpoint to minimize the risk of exploitation.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2020-5666

Affected Products

Melsec Iq-R Series Cpu Modules

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2020-5666 · Security Note
• https://osv.dev/vulnerability/CVE-2020-5666 · Vendor Advisory
• https://mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-015_en.pdf · Vendor Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-20-317-01 · Note
• https://jvn.jp/en/jp/JVN44764844/index.html · Note
• https://jvn.jp/jp/JVN44764844/index.html · Note