{
   "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" : [
         {
            "url" : "http://www.h5l.org/pipermail/heimdal-discuss/2017-August/000259.html"
         },
         {
            "url" : "http://h5l.org/advisories.html?show=2017-12-08"
         },
         {
            "url" : "http://www.h5l.org/pipermail/heimdal-announce/2017-December/000008.html"
         },
         {
            "url" : "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878144"
         },
         {
            "url" : "https://github.com/heimdal/heimdal/commit/1a6a6e462dc2ac6111f9e02c6852ddec4849b887"
         },
         {
            "url" : "https://github.com/heimdal/heimdal/issues/353"
         },
         {
            "url" : "https://www.debian.org/security/2017/dsa-4055"
         }
      ]
   }
}