Security advisory

{
  "id": "995e532317eb165dfe59b9eb7ad260680c34bc5324513203de960ba181365794",
  "url": "https://osv.dev/vulnerability/CVE-2017-12166",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-12166",
    "summary": "OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting in code execution.",
    "evidence": "osv:CVE-2017-12166",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2017-12166",
      "aliases": [
        "CVE-2017-12166"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openvpn/openvpn",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9779cef26e296bb7c94e336c0a1ea1f4da3276d9"
                },
                {
                  "introduced": "307abe7b32e951ece58c7964b3fa72536aee6724"
                },
                {
                  "fixed": "1f458322cdaffed02184df8c638bde69256a840a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.3.18"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.4.0"
                      },
                      {
                        "fixed": "2.4.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.3.17",
            "v2.4.3",
            "v2.3.16",
            "v2.3.15",
            "v2.4.2",
            "v2.4.1",
            "v2.4.0",
            "v2.3.14",
            "v2.3.13",
            "contains",
            "v2.3.12",
            "v2.3.11",
            "v2.3.10",
            "v2.3.9",
            "v2.3.8",
            "v2.3.7",
            "v2.3.6",
            "v2.3.5",
            "v2.3.4",
            "v2.3.3",
            "v2.3.2",
            "v2.3.1",
            "v2.3.0",
            "v2.3_rc2",
            "v2.3_rc1",
            "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-2017-12166.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:44.318968990Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html",
        "https://community.openvpn.net/openvpn/wiki/CVE-2017-12166"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "openvpn:openvpn",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "2.3.18"
                  },
                  {
                    "introduced": "2.4.0"
                  },
                  {
                    "fixed": "2.4.4"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2017-12166",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435845,
  "published_at": "2017-10-04T01:29:02.09+00:00"
}