Security advisory

{
  "id": "7a655a5218890886a97f5dc8369e5b1bdc438e0ea30564c581801fa4505c1f83",
  "url": "https://osv.dev/vulnerability/CVE-2019-19271",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-19271",
    "summary": "An issue was discovered in tls_verify_crl in ProFTPD before 1.3.6. A wrong iteration variable, used when checking a client certificate against CRL entries (installed by a system administrator), can cause some CRL entries to be ignored, and can allow clients whose certificates have been revoked to proceed with a connection to the server.",
    "evidence": "osv:CVE-2019-19271",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-19271",
      "aliases": [
        "CVE-2019-19271"
      ],
      "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"
                },
                {
                  "fixed": "14f155e2f194f75d05a1656d13f4228257ba3091"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:proftpd:proftpd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.3.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.6d",
            "v1.3.6c",
            "v1.3.6b",
            "v1.3.6a",
            "v1.3.6",
            "v1.3.6rc4",
            "v1.3.6rc3",
            "v1.3.6rc2",
            "v1.3.6rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19271.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:51.332081876Z",
      "provider": "osv",
      "references": [
        "https://github.com/proftpd/proftpd/issues/860"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-19271",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382253,
  "published_at": "2019-11-26T04:15:13.013+00:00"
}