{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.3.0"
              }
            ]
          }
        ]
      }
    }
  ],
  "details": "Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone transfer for (1) DDNS, (2) AXFR, or (3) IXFR.",
  "id": "CVE-2016-6171",
  "modified": "2026-03-15T21:48:03.537530414Z",
  "published": "2017-02-09T15:59:01.190Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2016/07/06/3"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2016/07/06/4"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.securityfocus.com/bid/91678"
    },
    {
      "type": "ADVISORY",
      "url": "https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWS"
    },
    {
      "type": "ADVISORY",
      "url": "https://gitlab.labs.nic.cz/labs/knot/issues/464"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sischkg/xfer-limit/blob/master/README.md"
    },
    {
      "type": "ARTICLE",
      "url": "https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}