{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.5.2"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "fd73a5df2ff0e1fb6ae6a51e2777d7a16cc4f4e0"
            }
          ],
          "repo": "https://github.com/pion/dtls",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "handleIncomingPacket in conn.go in Pion DTLS before 1.5.2 lacks a check for application data with epoch 0, which allows remote attackers to inject arbitrary unencrypted data after handshake completion.",
  "id": "CVE-2019-20786",
  "modified": "2026-03-15T21:49:40.981685414Z",
  "published": "2020-04-19T20:15:11.587Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.usenix.org/conference/usenixsecurity20/presentation/fiterau-brostean"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pion/dtls/commit/fd73a5df2ff0e1fb6ae6a51e2777d7a16cc4f4e0"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pion/dtls/compare/v1.5.1...v1.5.2"
    },
    {
      "type": "EVIDENCE",
      "url": "https://www.usenix.org/system/files/sec20fall_fiterau-brostean_prepub.pdf"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}