{
    "CVE_data_meta": {
        "ASSIGNER": "productcert@siemens.com",
        "ID": "CVE-2021-27391",
        "STATE": "PUBLIC"
    },
    "data_format": "MITRE",
    "data_version": "4.0",
    "data_type": "CVE",
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Siemens",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "APOGEE MBC (PPC) (P2 Ethernet)",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "All versions >= V2.6.3"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "APOGEE MEC (PPC) (P2 Ethernet)",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "All versions >= V2.6.3"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "APOGEE PXC Compact (BACnet)",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "All versions < V3.5.3"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "APOGEE PXC Compact (P2 Ethernet)",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "All versions >= V2.8"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "APOGEE PXC Modular (BACnet)",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "All versions < V3.5.3"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "APOGEE PXC Modular (P2 Ethernet)",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "All versions >= V2.8"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "TALON TC Compact (BACnet)",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "All versions < V3.5.3"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "TALON TC Modular (BACnet)",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "All versions < V3.5.3"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"
                    }
                ]
            }
        ]
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "A vulnerability has been identified in APOGEE MBC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE MEC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE PXC Compact (BACnet) (All versions < V3.5.3), APOGEE PXC Compact (P2 Ethernet) (All versions >= V2.8), APOGEE PXC Modular (BACnet) (All versions < V3.5.3), APOGEE PXC Modular (P2 Ethernet) (All versions >= V2.8), TALON TC Compact (BACnet) (All versions < V3.5.3), TALON TC Modular (BACnet) (All versions < V3.5.3). The web server of affected devices lacks proper bounds checking when parsing the Host parameter in HTTP requests, which could lead to a buffer overflow. An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary code on the device with root privileges."
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-944498.pdf",
                "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-944498.pdf"
            }
        ]
    }
}