cvelist/2022/42xxx/CVE-2022-42318.json

{
   "CVE_data_meta" : {
      "ASSIGNER" : "security@xenproject.org",
      "ID" : "CVE-2022-42318"
   },
   "affects" : {
      "vendor" : {
         "vendor_data" : [
            {
               "product" : {
                  "product_data" : [
                     {
                        "product_name" : "xen",
                        "version" : {
                           "version_data" : [
                              {
                                 "version_affected" : "?",
                                 "version_value" : "consult Xen advisory XSA-326"
                              }
                           ]
                        }
                     }
                  ]
               },
               "vendor_name" : "Xen"
            }
         ]
      }
   },
   "configuration" : {
      "configuration_data" : {
         "description" : {
            "description_data" : [
               {
                  "lang" : "eng",
                  "value" : "All Xen versions are vulnerable.\n\nBoth Xenstore implementations (C and Ocaml) are vulnerable."
               }
            ]
         }
      }
   },
   "credit" : {
      "credit_data" : {
         "description" : {
            "description_data" : [
               {
                  "lang" : "eng",
                  "value" : "This issue was discovered by Julien Grall of Amazon."
               }
            ]
         }
      }
   },
   "data_format" : "MITRE",
   "data_type" : "CVE",
   "data_version" : "4.0",
   "description" : {
      "description_data" : [
         {
            "lang" : "eng",
            "value" : "Xenstore: guests can let run xenstored out of memory\n\nT[his CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nMalicious guests can cause xenstored to allocate vast amounts of memory,\neventually resulting in a Denial of Service (DoS) of xenstored.\n\nThere are multiple ways how guests can cause large memory allocations\nin xenstored:\n\n- - by issuing new requests to xenstored without reading the responses,\n  causing the responses to be buffered in memory\n\n- - by causing large number of watch events to be generated via setting up\n  multiple xenstore watches and then e.g. deleting many xenstore nodes\n  below the watched path\n\n- - by creating as many nodes as allowed with the maximum allowed size and\n  path length in as many transactions as possible\n\n- - by accessing many nodes inside a transaction"
         }
      ]
   },
   "impact" : {
      "impact_data" : {
         "description" : {
            "description_data" : [
               {
                  "lang" : "eng",
                  "value" : "Unprivileged guests can cause a DoS of xenstored, resulting in the\ninability to create new guests or modify the configuration of running\nguests."
               }
            ]
         }
      }
   },
   "problemtype" : {
      "problemtype_data" : [
         {
            "description" : [
               {
                  "lang" : "eng",
                  "value" : "unknown"
               }
            ]
         }
      ]
   },
   "references" : {
      "reference_data" : [
         {
            "url" : "https://xenbits.xenproject.org/xsa/advisory-326.txt"
         }
      ]
   },
   "workaround" : {
      "workaround_data" : {
         "description" : {
            "description_data" : [
               {
                  "lang" : "eng",
                  "value" : "There is no mitigation available."
               }
            ]
         }
      }
   }
}