usn-6591-1
Vulnerability from osv_ubuntu
Published
2024-01-22 12:35
Modified
2026-06-29 10:53
Summary
postfix vulnerability
Details

Timo Longin discovered that Postfix incorrectly handled certain email line endings. A remote attacker could possibly use this issue to bypass an email authentication mechanism, allowing domain spoofing and potential spamming.

Please note that certain configuration changes are required to address this issue. They are not enabled by default for backward compatibility. Information can be found at https://www.postfix.org/smtp-smuggling.html.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:Pro:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "postfix",
            "binary_version": "2.11.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "postfix-cdb",
            "binary_version": "2.11.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "postfix-ldap",
            "binary_version": "2.11.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "postfix-mysql",
            "binary_version": "2.11.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "postfix-pcre",
            "binary_version": "2.11.0-1ubuntu1.2+esm2"
          },
          {
            "binary_name": "postfix-pgsql",
            "binary_version": "2.11.0-1ubuntu1.2+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "postfix",
        "purl": "pkg:deb/ubuntu/postfix@2.11.0-1ubuntu1.2+esm2?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.11.0-1ubuntu1.2+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.10.2-1",
        "2.10.2-1build1",
        "2.11.0-1",
        "2.11.0-1ubuntu1",
        "2.11.0-1ubuntu1.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "postfix",
            "binary_version": "3.1.0-3ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-cdb",
            "binary_version": "3.1.0-3ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-ldap",
            "binary_version": "3.1.0-3ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-mysql",
            "binary_version": "3.1.0-3ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-pcre",
            "binary_version": "3.1.0-3ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-pgsql",
            "binary_version": "3.1.0-3ubuntu0.4+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "postfix",
        "purl": "pkg:deb/ubuntu/postfix@3.1.0-3ubuntu0.4+esm2?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.0-3ubuntu0.4+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.11.3-1ubuntu2",
        "2.11.3-1ubuntu3",
        "3.0.4-1ubuntu1",
        "3.0.4-2",
        "3.0.4-3",
        "3.0.4-5",
        "3.0.4-5build1",
        "3.1.0-3",
        "3.1.0-3ubuntu0.1",
        "3.1.0-3ubuntu0.2",
        "3.1.0-3ubuntu0.3",
        "3.1.0-3ubuntu0.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "postfix",
            "binary_version": "3.3.0-1ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-cdb",
            "binary_version": "3.3.0-1ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-ldap",
            "binary_version": "3.3.0-1ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-lmdb",
            "binary_version": "3.3.0-1ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-mysql",
            "binary_version": "3.3.0-1ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-pcre",
            "binary_version": "3.3.0-1ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-pgsql",
            "binary_version": "3.3.0-1ubuntu0.4+esm2"
          },
          {
            "binary_name": "postfix-sqlite",
            "binary_version": "3.3.0-1ubuntu0.4+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "postfix",
        "purl": "pkg:deb/ubuntu/postfix@3.3.0-1ubuntu0.4+esm2?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.0-1ubuntu0.4+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.3-1",
        "3.2.3-1build1",
        "3.2.4-1",
        "3.2.5-1",
        "3.2.5-1build1",
        "3.3.0-1",
        "3.3.0-1ubuntu0.1",
        "3.3.0-1ubuntu0.2",
        "3.3.0-1ubuntu0.3",
        "3.3.0-1ubuntu0.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "postfix",
            "binary_version": "3.4.13-0ubuntu1.3"
          },
          {
            "binary_name": "postfix-cdb",
            "binary_version": "3.4.13-0ubuntu1.3"
          },
          {
            "binary_name": "postfix-ldap",
            "binary_version": "3.4.13-0ubuntu1.3"
          },
          {
            "binary_name": "postfix-lmdb",
            "binary_version": "3.4.13-0ubuntu1.3"
          },
          {
            "binary_name": "postfix-mysql",
            "binary_version": "3.4.13-0ubuntu1.3"
          },
          {
            "binary_name": "postfix-pcre",
            "binary_version": "3.4.13-0ubuntu1.3"
          },
          {
            "binary_name": "postfix-pgsql",
            "binary_version": "3.4.13-0ubuntu1.3"
          },
          {
            "binary_name": "postfix-sqlite",
            "binary_version": "3.4.13-0ubuntu1.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "postfix",
        "purl": "pkg:deb/ubuntu/postfix@3.4.13-0ubuntu1.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.13-0ubuntu1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.5-1ubuntu1",
        "3.4.7-1",
        "3.4.7-2",
        "3.4.8-1",
        "3.4.9-1",
        "3.4.10-1",
        "3.4.10-1ubuntu1",
        "3.4.13-0ubuntu1",
        "3.4.13-0ubuntu1.1",
        "3.4.13-0ubuntu1.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "postfix",
            "binary_version": "3.6.4-1ubuntu1.2"
          },
          {
            "binary_name": "postfix-cdb",
            "binary_version": "3.6.4-1ubuntu1.2"
          },
          {
            "binary_name": "postfix-ldap",
            "binary_version": "3.6.4-1ubuntu1.2"
          },
          {
            "binary_name": "postfix-lmdb",
            "binary_version": "3.6.4-1ubuntu1.2"
          },
          {
            "binary_name": "postfix-mysql",
            "binary_version": "3.6.4-1ubuntu1.2"
          },
          {
            "binary_name": "postfix-pcre",
            "binary_version": "3.6.4-1ubuntu1.2"
          },
          {
            "binary_name": "postfix-pgsql",
            "binary_version": "3.6.4-1ubuntu1.2"
          },
          {
            "binary_name": "postfix-sqlite",
            "binary_version": "3.6.4-1ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "postfix",
        "purl": "pkg:deb/ubuntu/postfix@3.6.4-1ubuntu1.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.4-1ubuntu1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.6-1ubuntu2",
        "3.5.13-1ubuntu1",
        "3.5.13-1ubuntu2",
        "3.5.13-1ubuntu3",
        "3.6.3-4ubuntu1",
        "3.6.3-5ubuntu1",
        "3.6.3-5ubuntu2",
        "3.6.4-1ubuntu1",
        "3.6.4-1ubuntu1.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Timo Longin discovered that Postfix incorrectly handled certain email line\nendings. A remote attacker could possibly use this issue to bypass an email\nauthentication mechanism, allowing domain spoofing and potential spamming.\n\nPlease note that certain configuration changes are required to address\nthis issue. They are not enabled by default for backward compatibility.\nInformation can be found at https://www.postfix.org/smtp-smuggling.html.\n",
  "id": "USN-6591-1",
  "modified": "2026-06-29T10:53:06Z",
  "published": "2024-01-22T12:35:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6591-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-51764"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/2049337"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "postfix vulnerability",
  "upstream": [
    "UBUNTU-CVE-2023-51764"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.