Security advisory

{
  "id": "ca216fb4600c852b0207c132bd1417d06551ce7ad4ebd76b6ded6fe50afbdc67",
  "url": "https://osv.dev/vulnerability/CVE-2019-6474",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-6474",
    "summary": "A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2",
    "evidence": "osv:CVE-2019-6474",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2019-6474",
      "aliases": [
        "CVE-2019-6474"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/isc-projects/kea",
              "type": "GIT",
              "events": [
                {
                  "introduced": "adecd0b6b6f2967f3e6d4c2258e59af2b0767168"
                },
                {
                  "last_affected": "a0d3d9729b506eaa4674e5bd8b25b87d84d2492d"
                },
                {
                  "introduced": "03f0af3900bdd9eaa951b23cc9508f0618d3f1bb"
                },
                {
                  "last_affected": "03f0af3900bdd9eaa951b23cc9508f0618d3f1bb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0"
                      },
                      {
                        "last_affected": "1.5.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:isc:kea:1.6.0:beta2:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.6.0-beta2"
                      },
                      {
                        "last_affected": "1.6.0-beta2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.6.0-beta2",
            "Kea-1.6.0-beta2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-6474.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://gitlab.isc.org/isc-projects/kea",
              "type": "GIT",
              "events": [
                {
                  "introduced": "adecd0b6b6f2967f3e6d4c2258e59af2b0767168"
                },
                {
                  "last_affected": "a0d3d9729b506eaa4674e5bd8b25b87d84d2492d"
                },
                {
                  "introduced": "03f0af3900bdd9eaa951b23cc9508f0618d3f1bb"
                },
                {
                  "last_affected": "03f0af3900bdd9eaa951b23cc9508f0618d3f1bb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0"
                      },
                      {
                        "last_affected": "1.5.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:isc:kea:1.6.0:beta2:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.6.0-beta2"
                      },
                      {
                        "last_affected": "1.6.0-beta2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.6.0-beta2",
            "Kea-1.6.0-beta2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-6474.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:31.878434067Z",
      "provider": "osv",
      "references": [
        "https://kb.isc.org/docs/cve-2019-6474"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:isc:kea:1.6.0:beta1:*:*:*:*:*:*"
            ],
            "vendor_product": "isc:kea",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.6.0-beta1"
                  },
                  {
                    "last_affected": "1.6.0-beta1"
                  },
                  {
                    "introduced": "1.6.0-beta1"
                  },
                  {
                    "last_affected": "1.6.0-beta1"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-6474",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432894,
  "published_at": "2019-10-16T18:15:37.217+00:00"
}