{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2017-17439",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc/kerberos5.c and the der_length_visible_string function in lib/asn1/der_length.c."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144",
                "refsource": "CONFIRM",
                "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144"
            },
            {
                "name": "https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887",
                "refsource": "CONFIRM",
                "url": "https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887"
            },
            {
                "name": "http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html",
                "refsource": "CONFIRM",
                "url": "http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html"
            },
            {
                "name": "http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html",
                "refsource": "MISC",
                "url": "http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html"
            },
            {
                "name": "https://github.com/heimdal/heimdal/issues/353",
                "refsource": "CONFIRM",
                "url": "https://github.com/heimdal/heimdal/issues/353"
            },
            {
                "name": "http://h5l.org/advisories.html?show=2017-12-08",
                "refsource": "CONFIRM",
                "url": "http://h5l.org/advisories.html?show=2017-12-08"
            },
            {
                "name": "DSA-4055",
                "refsource": "DEBIAN",
                "url": "https://www.debian.org/security/2017/dsa-4055"
            }
        ]
    }
}