Security advisory

{
  "id": "de78befbca0ea8154171384a699cb27e1a1f8165e1a164984341dcbfcb61cee5",
  "url": "https://osv.dev/vulnerability/CVE-2019-19270",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-19270",
    "summary": "An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.",
    "evidence": "osv:CVE-2019-19270",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-19270",
      "aliases": [
        "CVE-2019-19270"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/proftpd/proftpd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "46a4c089eec7dfc9b7c168c98bdb06371eb694ef"
                },
                {
                  "introduced": "14f155e2f194f75d05a1656d13f4228257ba3091"
                },
                {
                  "last_affected": "14f155e2f194f75d05a1656d13f4228257ba3091"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:proftpd:proftpd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.3.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:proftpd:proftpd:1.3.6:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.3.6-NA"
                      },
                      {
                        "last_affected": "1.3.6-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3.6-NA",
            "v1.3.6e",
            "v1.3.5e",
            "v1.3.5d",
            "v1.3.5c",
            "v1.3.5b",
            "v1.3.5a"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19270.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:51.315069703Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/",
        "https://github.com/proftpd/proftpd/issues/859"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "30"
                  },
                  {
                    "last_affected": "30"
                  },
                  {
                    "introduced": "31"
                  },
                  {
                    "last_affected": "31"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:proftpd:proftpd:1.3.6:alpha:*:*:*:*:*:*",
              "cpe:2.3:a:proftpd:proftpd:1.3.6:beta:*:*:*:*:*:*"
            ],
            "vendor_product": "proftpd:proftpd",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.3.6-alpha"
                  },
                  {
                    "last_affected": "1.3.6-alpha"
                  },
                  {
                    "introduced": "1.3.6-beta"
                  },
                  {
                    "last_affected": "1.3.6-beta"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-19270",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382252,
  "published_at": "2019-11-26T04:15:12.95+00:00"
}