GHSA-WGJV-9J3Q-JHG8

Vulnerability from github – Published: 2024-05-20 14:59 – Updated: 2026-06-10 13:41
VLAI
Summary
aiosmtpd STARTTLS unencrypted commands injection
Details

Summary

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 MitM attack.

References

Severity
5.4 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "aiosmtpd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-34083"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-349"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-05-20T14:59:07Z",
    "nvd_published_at": "2024-05-18T19:15:49Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nServers 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 MitM attack.\n\n### References\n* [NO STARTTLS: Similar vulnerabilities discovered by previous researchers.](https://nostarttls.secvuln.info/)",
  "id": "GHSA-wgjv-9j3q-jhg8",
  "modified": "2026-06-10T13:41:53Z",
  "published": "2024-05-20T14:59:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-wgjv-9j3q-jhg8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-34083"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiosmtpd/commit/b3a4a2c6ecfd228856a20d637dc383541fcdbfda"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aio-libs/aiosmtpd"
    },
    {
      "type": "WEB",
      "url": "https://nostarttls.secvuln.info"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "aiosmtpd STARTTLS unencrypted commands injection"
}



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