CVE-2021-20609: High severity mitsubishi melsec iq-r r00 cpu firmware vulnerability

Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU Firmware versions "24" and prior, Mitsubishi Electric MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions "57" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120SFCPU Firmware versions "28" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120PCPU Firmware versions "29" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120PSFCPU Firmware versions "08" and prior, Mitsubishi Electric MELSEC iQ-R Series R16/32/64MTCPU Operating system software version "23" and prior, Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V Firmware versions "16" and prior, Mitsubishi Electric MELSEC Q Series Q03UDECPU The first 5 digits of serial No. "23121" and prior, Mitsubishi Electric MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU The first 5 digits of serial No. "23121" and prior, Mitsubishi Electric MELSEC Q Series Q03/04/06/13/26UDVCPU The first 5 digits of serial No. "23071" and prior, Mitsubishi Electric MELSEC Q Series Q04/06/13/26UDPVCPU The first 5 digits of serial No. "23071" and prior, Mitsubishi Electric MELSEC Q Series Q12DCCPU-V The first 5 digits of serial No. "24031" and prior, Mitsubishi Electric MELSEC Q Series Q24DHCCPU-V(G) The first 5 digits of serial No. "24031" and prior, Mitsubishi Electric MELSEC Q Series Q24/26DHCCPU-LS The first 5 digits of serial No. "24031" and prior, Mitsubishi Electric MELSEC Q Series MR-MQ100 Operating system software version "F" and prior, Mitsubishi Electric MELSEC Q Series Q172/173DCPU-S1 Operating system software version "W" and prior, Mitsubishi Electric MELSEC Q Series Q172/173DSCPU All versions, Mitsubishi Electric MELSEC Q Series Q170MCPU Operating system software version "W" and prior, Mitsubishi Electric MELSEC Q Series Q170MSCPU(-S1) All versions, Mitsubishi Electric MELSEC L Series L02/06/26CPU(-P) The first 5 digits of serial No. "23121" and prior, Mitsubishi Electric MELSEC L Series L26CPU-(P)BT The first 5 digits of serial No. "23121" and prior and Mitsubishi Electric MELIPC Series MI5122-VW Firmware versions "05" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.