PT-2022-9193 · Mitsubishi · Melsec-F Series Fx3U-Enet+1

Published 2022-01-14 · Updated 2022-01-21 · CVE-2021-20613

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions MELSEC-F series FX3U-ENET Firmware versions prior to 1.17 MELSEC-F series FX3U-ENET-L Firmware versions prior to 1.17 MELSEC-F series FX3U-ENET-P502 Firmware versions prior to 1.17

Description The issue allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in the communication function of the product by sending specially crafted packets. Control by MELSEC-F series PLC is not affected, but a system reset is required for recovery.

Recommendations For MELSEC-F series FX3U-ENET Firmware versions prior to 1.17, update to version 1.17 or later. For MELSEC-F series FX3U-ENET-L Firmware versions prior to 1.17, update to version 1.17 or later. For MELSEC-F series FX3U-ENET-P502 Firmware versions prior to 1.17, update to version 1.17 or later.

Fix

Improper Initialization

Weakness Enumeration

CWE-665

Related Identifiers

CVE-2021-20613

Affected Products

Melsec-F Series Fx3U-Enet

Melsec-F Series Fx3U-Enet-P502

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-20613 · Security Note
• https://osv.dev/vulnerability/CVE-2021-20613 · Vendor Advisory
• https://mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-024_en.pdf · Vendor Advisory
• https://jvn.jp/vu/JVNVU93268332/index.html · Note
• https://cisa.gov/uscert/ics/advisories/icsa-22-013-07 · Note