Security advisory

{
  "id": "17af3c18a266284ed6f213bef3ef9aafa8cc0c5c6285e5973691819789efc4c7",
  "url": "https://osv.dev/vulnerability/CVE-2020-20813",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-20813",
    "summary": "Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.",
    "evidence": "osv:CVE-2020-20813",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-20813",
      "aliases": [
        "CVE-2020-20813"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openvpn/openvpn",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "2b8aec62d5db2c17d5d4052991bc18272748bf29"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.4.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.4.7",
            "v2.4.6",
            "v2.4.5",
            "v2.4.4",
            "v2.4.3",
            "v2.4.2",
            "v2.4.1",
            "v2.4.0",
            "v2.4_rc2",
            "v2.4_rc1",
            "v2.4_beta2",
            "v2.4_beta1",
            "v2.4_alpha2",
            "v2.4_alpha1",
            "v2.3_beta1",
            "v2.3_alpha3",
            "v2.3_alpha2",
            "v2.3-alpha1",
            "v2.2-RC2",
            "v2.2-RC",
            "v2.2-beta5",
            "v2.2-beta4",
            "v2.1.3",
            "v2.1.2",
            "v2.1.1",
            "v2.1.0",
            "v2.1_rc22",
            "v2.1_rc21",
            "v2.1_rc20",
            "v2.1_rc19",
            "v2.1_rc18",
            "v2.1_rc17",
            "v2.1_rc16",
            "v2.1_rc15",
            "v2.1_rc14",
            "v2.1_rc13",
            "v2.1_rc12",
            "v2.1_rc11",
            "v2.1_rc10",
            "v2.1_rc9",
            "v2.1_rc8",
            "v2.1_rc7",
            "v2.1_rc6",
            "v2.1_rc5",
            "v2.1_rc4",
            "v2.1_rc3",
            "v2.1_rc2",
            "v2.1_rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20813.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:32.508476929Z",
      "provider": "osv",
      "references": [
        "https://www.freebuf.com/vuls/215171.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "openvpn:openvpn",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "2.4.7"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-20813",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433045,
  "published_at": "2023-08-22T19:16:08.247+00:00"
}