{
  "GSD": {
    "alias": "CVE-2023-2828",
    "id": "GSD-2023-2828"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-2828"
      ],
      "details": "Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit.\n\nIt has been discovered that the effectiveness of the cache-cleaning algorithm used in `named` can be severely diminished by querying the resolver for specific RRsets in a certain order, effectively allowing the configured `max-cache-size` limit to be significantly exceeded.\nThis issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0 through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.",
      "id": "GSD-2023-2828",
      "modified": "2023-12-13T01:20:32.506168Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ASSIGNER": "security-officer@isc.org",
        "ID": "CVE-2023-2828",
        "STATE": "PUBLIC"
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      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "BIND 9",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_name": "9.11.0",
                          "version_value": "9.16.41"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_name": "9.18.0",
                          "version_value": "9.18.15"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_name": "9.19.0",
                          "version_value": "9.19.13"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_name": "9.11.3-S1",
                          "version_value": "9.16.41-S1"
                        },
                        {
                          "version_affected": "\u003c=",
                          "version_name": "9.18.11-S1",
                          "version_value": "9.18.15-S1"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "ISC"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Shoham Danino from Reichman University, Anat Bremler-Barr from Tel-Aviv University, Yehuda Afek from Tel-Aviv University, and Yuval Shavitt from Tel-Aviv University for bringing this vulnerability to our attention."
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
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          {
            "lang": "eng",
            "value": "Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit.\n\nIt has been discovered that the effectiveness of the cache-cleaning algorithm used in `named` can be severely diminished by querying the resolver for specific RRsets in a certain order, effectively allowing the configured `max-cache-size` limit to be significantly exceeded.\nThis issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0 through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-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": {
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          {
            "name": "https://kb.isc.org/docs/cve-2023-2828",
            "refsource": "MISC",
            "url": "https://kb.isc.org/docs/cve-2023-2828"
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            "name": "http://www.openwall.com/lists/oss-security/2023/06/21/6",
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            "url": "http://www.openwall.com/lists/oss-security/2023/06/21/6"
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          {
            "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/",
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/"
          },
          {
            "name": "https://www.debian.org/security/2023/dsa-5439",
            "refsource": "MISC",
            "url": "https://www.debian.org/security/2023/dsa-5439"
          },
          {
            "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/",
            "refsource": "MISC",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20230703-0010/",
            "refsource": "MISC",
            "url": "https://security.netapp.com/advisory/ntap-20230703-0010/"
          },
          {
            "name": "https://lists.debian.org/debian-lts-announce/2023/07/msg00021.html",
            "refsource": "MISC",
            "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00021.html"
          }
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      "solution": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.42, 9.18.16, 9.19.14, 9.16.42-S1, or 9.18.16-S1."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "work_around": [
        {
          "lang": "en",
          "value": "No workarounds known."
        }
      ]
    },
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            "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"
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          "exploitabilityScore": 3.9,
          "impactScore": 3.6
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      },
      "lastModifiedDate": "2023-07-21T19:19Z",
      "publishedDate": "2023-06-21T17:15Z"
    }
  }
}