Security advisory

{
  "id": "f7dcb4e45eded54a02fdfacf30181c78ecbe52417436d523d431deaae6b958ed",
  "url": "https://osv.dev/vulnerability/CVE-2017-8301",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-8301",
    "summary": "LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied upon for a later check of a verification result, in a use case where a user-provided verification callback returns 1, as demonstrated by acceptance of invalid certificates by nginx.",
    "evidence": "osv:CVE-2017-8301",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2017-8301",
      "aliases": [
        "CVE-2017-8301"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libressl/portable",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b67d365454e3d35f775dda738697615094e81c4e"
                },
                {
                  "last_affected": "b2a6ff75b73195ffc1b71c76deaf878997ffd870"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openbsd:libressl:2.5.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.5.1"
                      },
                      {
                        "last_affected": "2.5.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:openbsd:libressl:2.5.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.5.2"
                      },
                      {
                        "last_affected": "2.5.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:openbsd:libressl:2.5.3:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.5.3"
                      },
                      {
                        "last_affected": "2.5.3"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.5.1",
            "2.5.2",
            "2.5.3",
            "v2.5.3",
            "v2.5.2",
            "v2.5.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-8301.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:34.290811150Z",
      "provider": "osv",
      "references": [
        "https://github.com/libressl-portable/portable/issues/307",
        "https://trac.nginx.org/nginx/ticket/1257"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-8301",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380561,
  "published_at": "2017-04-27T17:59:00.187+00:00"
}