CVE-2020-5668: High severity Mitsubishielectric R00cpu Firmware vulnerability
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
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2020-5668?
CVE-2020-5668 has a high severity rating due to the potential for uncontrolled resource consumption, which can lead to a denial of service.
How do I fix CVE-2020-5668?
To fix CVE-2020-5668, update your MELSEC iQ-R Series modules to the latest firmware version as recommended by Mitsubishi Electric.
Which versions of MELSEC iQ-R Series modules are affected by CVE-2020-5668?
CVE-2020-5668 affects R00/01/02CPU firmware versions '19' and earlier, R04/08/16/32/120 (EN) CPU firmware versions '51' and earlier, and several other specific firmware versions.
Can CVE-2020-5668 lead to system downtime?
Yes, CVE-2020-5668 can lead to significant system downtime due to resource exhaustion if exploited.
Is there any workaround for CVE-2020-5668?
Currently, the best approach for CVE-2020-5668 is to upgrade to the patched firmware, as there are no cited workarounds for the vulnerability.