{
    "CVE_data_meta": {
        "ASSIGNER": "info@cert.vde.com",
        "DATE_PUBLIC": "2021-05-20T10:00:00.000Z",
        "ID": "CVE-2021-21000",
        "STATE": "PUBLIC",
        "TITLE": "WAGO: PFC200 Denial of Service due to the number of connections to the runtime"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Series PFC200 Controller",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-823",
                                            "version_value": "FW07"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-829",
                                            "version_value": "FW14"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-831/000-00x",
                                            "version_value": "FW14"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-832/000-00x",
                                            "version_value": "FW06"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-852",
                                            "version_value": "FW14"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-862",
                                            "version_value": "FW07"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-880/0xx-xxx",
                                            "version_value": "FW15"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-881",
                                            "version_value": "FW14"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-882",
                                            "version_value": "FW14"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-885/0xx-xxx",
                                            "version_value": "FW14"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-889",
                                            "version_value": "FW14"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-890/0xx-xxx",
                                            "version_value": "FW07"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-891",
                                            "version_value": "FW07"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_name": "750-893",
                                            "version_value": "FW07"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "Series Ethernet Controller",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8202/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8203/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8204/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8206/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8207/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8208/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8210/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8211/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8212/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8213/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8214/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8216/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "750-8217/xxx-xxx",
                                            "version_value": "03.06.19 (18)"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "WAGO"
                }
            ]
        }
    },
    "credit": [
        {
            "lang": "eng",
            "value": "These vulnerabilities were reported by JSC Positive Technologies (Vyacheslav Moskvin, Anton Dorfman, Sergey Fedonin, Ivan Kurnakov, Denis Goryushev). Coordination done by CERT@VDE."
        }
    ],
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime."
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.0.9"
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "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:L",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-770 Allocation of Resources Without Limits or Throttling"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://cert.vde.com/en-us/advisories/vde-2021-014",
                "refsource": "CONFIRM",
                "url": "https://cert.vde.com/en-us/advisories/vde-2021-014"
            }
        ]
    },
    "solution": [
        {
            "lang": "eng",
            "value": "WAGO recommends all effected users with CODESYS 2.3 Runtime PLCs to update to the firmware versions listed at https://cert.vde.com/en-us/advisories/vde-2021-014 in the solution paragraph."
        }
    ],
    "source": {
        "advisory": "VDE-2021-014",
        "defect": [
            "VDE-2021-014"
        ],
        "discovery": "EXTERNAL"
    },
    "work_around": [
        {
            "lang": "eng",
            "value": "Use general security best practices to protect systems from local and network attacks.\nDo not allow direct access to the device from untrusted networks.\nUpdate to the latest firmware according to the table in chapter solutions."
        }
    ]
}