Security advisory

{
  "id": "f338570695a4075400eaf29e4ef27ee208c12caf5f64312bf275443fe6739b53",
  "url": "https://osv.dev/vulnerability/CVE-2019-16791",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-16791",
    "summary": "In postfix-mta-sts-resolver before 0.5.1, All users can receive incorrect response from daemon under rare conditions, rendering downgrade of effective STS policy.",
    "evidence": "osv:CVE-2019-16791",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2019-16791",
      "aliases": [
        "CVE-2019-16791",
        "GHSA-h92m-42h4-82f6",
        "PYSEC-2020-174"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/snawoot/postfix-mta-sts-resolver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "072601f106a152b4c2278dd963eadb51ee62b7bf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:postfix-mta-sts-resolver_project:postfix-mta-sts-resolver:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.5.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.5.0",
            "v0.4.5",
            "v0.4.4",
            "v0.4.3",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.0",
            "v0.2.9",
            "v0.2.8",
            "v0.2.7",
            "v0.2.5",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.0",
            "v0.1.5",
            "v0.1.4",
            "v0.1.3",
            "v0.1.2",
            "v0.1.1",
            "v0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-16791.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:37.997798771Z",
      "provider": "osv",
      "references": [
        "https://gist.github.com/Snawoot/b9da85d6b26dea5460673b29df1adc6b",
        "https://github.com/Snawoot/postfix-mta-sts-resolver/security/advisories/GHSA-h92m-42h4-82f6"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-16791",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382694,
  "published_at": "2020-01-22T02:15:11.367+00:00"
}