STARTTLS unencrypted commands injection

{
  "id": "2d728aacbfad212d189615620433538aced560729a3a4d9bc9c54df00e3e3ed2",
  "url": "https://osv.dev/vulnerability/CVE-2024-34083",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "STARTTLS unencrypted commands injection",
    "summary": "aiosmptd is a reimplementation of the Python stdlib smtpd.py based on asyncio. Prior to version 1.4.6, servers based on aiosmtpd accept extra unencrypted commands after STARTTLS, treating them as if they came from inside the encrypted connection. This could be exploited by a man-in-the-middle attack. Version 1.4.6 contains a patch for the issue.",
    "evidence": "osv:CVE-2024-34083",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-34083",
      "aliases": [
        "CVE-2024-34083",
        "GHSA-wgjv-9j3q-jhg8",
        "PYSEC-2026-1111"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/aio-libs/aiosmtpd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "f40ac96bfa6a77b593492939049729f46d141767"
                },
                {
                  "fixed": "b3a4a2c6ecfd228856a20d637dc383541fcdbfda"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b3a4a2c6ecfd228856a20d637dc383541fcdbfda"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.4.5",
            "1.4.4.post2",
            "1.4.4",
            "1.4.3",
            "1.4.3rc2",
            "1.4.3rc1",
            "1.4.2",
            "1.4.1",
            "1.4.0",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "1.3.0a3",
            "1.3.0a2",
            "1.2.4",
            "1.2.3",
            "1.2.2",
            "1.2.1",
            "1.2-rc",
            "1.2",
            "1.1",
            "1.0",
            "1.0rc1",
            "1.0b1",
            "1.0a5",
            "1.0a4",
            "1.0a3",
            "1.0a2",
            "1.0a1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-34083.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.685417626Z",
      "provider": "osv",
      "references": [
        "https://nostarttls.secvuln.info",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/34xxx/CVE-2024-34083.json",
        "https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-wgjv-9j3q-jhg8",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-34083",
        "https://github.com/aio-libs/aiosmtpd/commit/b3a4a2c6ecfd228856a20d637dc383541fcdbfda"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-349"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/34xxx/CVE-2024-34083.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-34083",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492380,
  "published_at": "2024-05-18T18:12:19.442+00:00"
}