CVE-2020-5668 Information

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

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-016.pdf https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-016_en.pdf https://us-cert.cisa.gov/ics/advisories/icsa-20-324-05 https://jvn.jp/vu/JVNVU95980140/index.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5