CVE-2020-5668

HIGH

MELSEC iQ-R Series CPU Firmware - Unauthenticated Denial of Service via SLMP Packet

Title source: llm
STIX 2.1

Description

Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series modules (R00/01/02CPU firmware version '19' and earlier, R04/08/16/32/120 (EN) CPU firmware version '51' and earlier, R08/16/32/120SFCPU firmware version '22' and earlier, R08/16/32/120PCPU firmware version '25' and earlier, R08/16/32/120PSFCPU firmware version '06' and earlier, RJ71EN71 firmware version '47' and earlier, RJ71GF11-T2 firmware version '47' and earlier, RJ72GF15-T2 firmware version '07' and earlier, RJ71GP21-SX firmware version '47' and earlier, RJ71GP21S-SX firmware version '47' and earlier, and RJ71GN11-T2 firmware version '11' and earlier) allows a remote unauthenticated attacker to cause an error in a CPU unit and cause a denial-of-service (DoS) condition in execution of the program and its communication, or to cause a denial-of-service (DoS) condition in communication via the unit by receiving a specially crafted SLMP packet

References (4)

Core 4
Core References
Third Party Advisory, US Government Resource x_refsource_misc
https://us-cert.cisa.gov/ics/advisories/icsa-20-324-05
Third Party Advisory x_refsource_misc
https://jvn.jp/vu/JVNVU95980140/index.html

Scores

CVSS v3 7.5
EPSS 0.0312
EPSS Percentile 87.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-400
Status published
Products (28)
mitsubishielectric/r00cpu_firmware < 19
mitsubishielectric/r01cpu_firmware < 19
mitsubishielectric/r02cpu_firmware < 19
mitsubishielectric/r04cpu_firmware < 51
mitsubishielectric/r08cpu_firmware < 51
mitsubishielectric/r08pcpu_firmware < 25
mitsubishielectric/r08psfcpu_firmware < 06
mitsubishielectric/r08sfcpu_firmware < 22
mitsubishielectric/r120cpu_firmware < 51
mitsubishielectric/r120pcpu_firmware < 25
... and 18 more
Published Nov 20, 2020
Tracked Since Feb 18, 2026