{
  "GSD": {
    "alias": "CVE-2023-6516",
    "id": "GSD-2023-6516"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-6516"
      ],
      "details": "To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the cache element that can be cleaned up is first allocated and then queued for later processing. It was discovered that if the resolver is continuously processing query patterns triggering this type of cache-database maintenance, `named` may not be able to handle the cleanup events in a timely manner. This in turn enables the list of queued cleanup events to grow infinitely large over time, allowing the configured `max-cache-size` limit to be significantly exceeded.\nThis issue affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1.",
      "id": "GSD-2023-6516",
      "modified": "2023-12-13T01:20:32.972993Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-officer@isc.org",
        "ID": "CVE-2023-6516",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "BIND 9",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_name": "9.16.0",
                          "version_value": "9.16.45"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_name": "9.16.8-S1",
                          "version_value": "9.16.45-S1"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "ISC"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Infoblox for bringing this vulnerability to our attention."
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the cache element that can be cleaned up is first allocated and then queued for later processing. It was discovered that if the resolver is continuously processing query patterns triggering this type of cache-database maintenance, `named` may not be able to handle the cleanup events in a timely manner. This in turn enables the list of queued cleanup events to grow infinitely large over time, allowing the configured `max-cache-size` limit to be significantly exceeded.\nThis issue affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1."
          }
        ]
      },
      "exploit": [
        {
          "lang": "en",
          "value": "We are not aware of any active exploits."
        }
      ],
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "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:H",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://kb.isc.org/docs/cve-2023-6516",
            "refsource": "MISC",
            "url": "https://kb.isc.org/docs/cve-2023-6516"
          },
          {
            "name": "http://www.openwall.com/lists/oss-security/2024/02/13/1",
            "refsource": "MISC",
            "url": "http://www.openwall.com/lists/oss-security/2024/02/13/1"
          },
          {
            "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/",
            "refsource": "MISC",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/"
          },
          {
            "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/",
            "refsource": "MISC",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/"
          }
        ]
      },
      "solution": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.48 or 9.16.48-S1."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "work_around": [
        {
          "lang": "en",
          "value": "No workarounds known."
        }
      ]
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the cache element that can be cleaned up is first allocated and then queued for later processing. It was discovered that if the resolver is continuously processing query patterns triggering this type of cache-database maintenance, `named` may not be able to handle the cleanup events in a timely manner. This in turn enables the list of queued cleanup events to grow infinitely large over time, allowing the configured `max-cache-size` limit to be significantly exceeded.\nThis issue affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1."
          },
          {
            "lang": "es",
            "value": "Para mantener eficiente su base de datos de cach\u00e9, `named` que se ejecuta como un solucionador recursivo intenta ocasionalmente limpiar la base de datos. Utiliza varios m\u00e9todos, incluidos algunos que son asincr\u00f3nicos: primero se asigna una peque\u00f1a porci\u00f3n de memoria que apunta al elemento de cach\u00e9 que se puede limpiar y luego se pone en cola para su posterior procesamiento. Se descubri\u00f3 que si el solucionador procesa continuamente patrones de consulta que desencadenan este tipo de mantenimiento de la base de datos de cach\u00e9, es posible que \"named\" no pueda manejar los eventos de limpieza de manera oportuna. Esto, a su vez, permite que la lista de eventos de limpieza en cola crezca infinitamente con el tiempo, lo que permite superar significativamente el l\u00edmite de \"tama\u00f1o m\u00e1ximo de cach\u00e9\" configurado. Este problema afecta a las versiones 9.16.0 a 9.16.45 y 9.16.8-S1 a 9.16.45-S1 de BIND 9."
          }
        ],
        "id": "CVE-2023-6516",
        "lastModified": "2024-03-04T03:15:06.827",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "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:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "security-officer@isc.org",
              "type": "Primary"
            }
          ]
        },
        "published": "2024-02-13T14:15:46.030",
        "references": [
          {
            "source": "security-officer@isc.org",
            "url": "http://www.openwall.com/lists/oss-security/2024/02/13/1"
          },
          {
            "source": "security-officer@isc.org",
            "url": "https://kb.isc.org/docs/cve-2023-6516"
          },
          {
            "source": "security-officer@isc.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/"
          },
          {
            "source": "security-officer@isc.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/"
          }
        ],
        "sourceIdentifier": "security-officer@isc.org",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}