sendmail — security advisory

{
  "id": "943f0a409d095bca83c97ccc18ec4cd7fa32ce03b6d0c94cc2e6b284f606f33a",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2009-4565",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2009-4565",
    "summary": "sendmail before 8.14.4 does not properly handle a '\\0' character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.",
    "evidence": "osv:DEBIAN-CVE-2009-4565",
    "products": [
      {
        "name": {
          "value": "sendmail",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.14.3-9.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "sendmail",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.14.3-9.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "sendmail",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.14.3-9.1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "DEBIAN-CVE-2009-4565",
      "aliases": [
        "DEBIAN-CVE-2009-4565"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.14.3-9.1"
                }
              ]
            }
          ],
          "package": {
            "name": "sendmail",
            "purl": "pkg:deb/debian/sendmail?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-4565.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.14.3-9.1"
                }
              ]
            }
          ],
          "package": {
            "name": "sendmail",
            "purl": "pkg:deb/debian/sendmail?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-4565.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.14.3-9.1"
                }
              ]
            }
          ],
          "package": {
            "name": "sendmail",
            "purl": "pkg:deb/debian/sendmail?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-4565.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        }
      ],
      "modified": "2026-10-23T17:47:28.637801367Z",
      "provider": "osv",
      "upstream": [
        "CVE-2009-4565"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2009-4565"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2009-4565",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 417131,
  "published_at": "2010-01-04T21:30:00.64+00:00"
}