{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.3.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "633dc231b8d9967520627528a92506efca7cebcd"
            }
          ],
          "repo": "https://github.com/iotivity/iotivity",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "In IoTivity through 1.3.1, the CoAP server interface can be used for Distributed Denial of Service attacks using source IP address spoofing and UDP-based traffic amplification. The reflected traffic is 6 times bigger than spoofed requests. This occurs because the construction of a \"4.01 Unauthorized\" response is mishandled. NOTE: the vendor states \"While this is an interesting attack, there is no plan for maintainer to fix, as we are migrating to IoTivity Lite.\"",
  "id": "CVE-2019-9750",
  "modified": "2026-03-13T21:46:39.814325231Z",
  "published": "2019-03-13T19:29:00.347Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://jira.iotivity.org/browse/IOT-3267"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}