{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-20609",
        "ASSIGNER": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU, MELSEC iQ-R Series R08/16/32/120SFCPU, MELSEC iQ-R Series R08/16/32/120PCPU, MELSEC iQ-R Series R08/16/32/120PSFCPU, MELSEC iQ-R Series R16/32/64MTCPU, MELSEC iQ-R Series R12CCPU-V, MELSEC Q Series Q03UDECPU, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU, MELSEC Q Series Q03/04/06/13/26UDVCPU, MELSEC Q Series Q04/06/13/26UDPVCPU, MELSEC Q Series Q12DCCPU-V, MELSEC Q Series Q24DHCCPU-V(G), MELSEC Q Series Q24/26DHCCPU-LS, MELSEC Q Series MR-MQ100, MELSEC Q Series Q172/173DCPU-S1, MELSEC Q Series Q172/173DSCPU, MELSEC Q Series Q170MCPU, MELSEC Q Series Q170MSCPU(-S1), MELSEC L Series L02/06/26CPU(-P), MELSEC L Series L26CPU-(P)BT and MELIPC Series MI5122-VW allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400 Uncontrolled Resource Consumption",
                        "cweId": "CWE-400"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Mitsubishi Electric Corporation",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "MELSEC iQ-R Series R00CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"24\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R01CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"24\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R02CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"24\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R04CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R08CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R16CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R32CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R120CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R04ENCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R08ENCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R16ENCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R32ENCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R120ENCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"57\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R08SFCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"26\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R16SFCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"26\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R32SFCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"26\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R120SFCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"26\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R08PCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"29\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R16PCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"29\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R32PCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"29\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R120PCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"29\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R08PSFCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"08\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R16PSFCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"08\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R32PSFCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"08\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R120PSFCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"08\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R16MTCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"23\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R32MTCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"23\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R64MTCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"23\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC iQ-R Series R12CCPU-V",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"16\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q03UDECPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q04UDEHCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q06UDEHCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q10UDEHCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q13UDEHCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q20UDEHCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q26UDEHCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q50UDEHCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q100UDEHCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q03UDVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q04UDVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q06UDVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q13UDVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q26UDVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q04UDPVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q06UDPVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q13UDPVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q26UDPVCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23071\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q12DCCPU-V",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"24031\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q24DHCCPU-V ",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"24031\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q24DHCCPU-VG",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"24031\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q24DHCCPU-LS",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"24031\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q26DHCCPU-LS",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"24031\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series MR-MQ100",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"F\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q172DCPU-S1",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"W\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q173DCPU-S1",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"W\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q172DSCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"Y\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q173DSCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"Y\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q170MCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"W\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q170MSCPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"Y\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC Q Series Q170MSCPU-S1",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Operating system software version \"Y\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC L Series L02CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC L Series L06CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC L Series L26CPU",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC L Series L02CPU-P",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC L Series L06CPU-P",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC L Series L26CPU-P",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC L Series L26CPU-BT",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELSEC L Series L26CPU-PBT",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "The first 5 digits of serial No. \"23121\" and prior"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "MELIPC Series MI5122-VW",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Firmware versions \"05\" and prior"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdf",
                "refsource": "MISC",
                "name": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdf"
            },
            {
                "url": "https://jvn.jp/vu/JVNVU94434051/index.html",
                "refsource": "MISC",
                "name": "https://jvn.jp/vu/JVNVU94434051/index.html"
            },
            {
                "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02",
                "refsource": "MISC",
                "name": "https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02"
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.1.0-dev"
    },
    "source": {
        "discovery": "UNKNOWN"
    },
    "impact": {
        "cvss": [
            {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
            }
        ]
    }
}