{
  "canonical_id": "nginx--CVE-2014-3556",
  "system_id": "nginx",
  "display_name": "Nginx",
  "category": "servers",
  "advisory_mode": "server",
  "title": "CVE-2014-3556",
  "summary": "The STARTTLS implementation in mail/ngx_mail_smtp_handler.c in the SMTP proxy in nginx 1.5.x and 1.6.x before 1.6.1 and 1.7.x before 1.7.4 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a \"plaintext command injection\" attack, a similar issue to CVE-2011-0411.",
  "published_at": "2014-12-29T20:59:03.943",
  "updated_at": "2025-04-12T10:46:40.837",
  "severity": "medium",
  "cvss_score": 6.8,
  "exploit_status": "unknown",
  "source_confidence": "official",
  "official_source_url": "http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html",
  "secondary_source_urls": [
    "http://marc.info/?l=bugtraq&m=142103967620673&w=2",
    "http://nginx.org/download/patch.2014.starttls.txt",
    "https://bugzilla.redhat.com/show_bug.cgi?id=1126891"
  ],
  "aliases": [
    "CVE-2014-3556"
  ],
  "cve_ids": [
    "CVE-2014-3556"
  ],
  "ghsa_ids": [],
  "osv_ids": [],
  "affected_versions": [],
  "fixed_versions": [],
  "package_name": null,
  "render_markdown": false,
  "case_path": null,
  "secure_code_topics": [
    "proxy-trust-boundary",
    "request-smuggling-boundary",
    "csp-trusted-types",
    "token-cookie-storage"
  ],
  "status": "triage",
  "triage_reasons": [
    "missing affected/fixed version details"
  ],
  "verification_status": "triage-manual",
  "verification_mode": "synthetic",
  "last_verified_at": null,
  "last_run_id": null,
  "evidence_bundle": null,
  "historical_status": null,
  "latest_status": null,
  "browser_evidence": {
    "required": false,
    "present": false,
    "refs": []
  },
  "repro_profile_id": "proxy-boundary-generic",
  "artifact_mode": "official-image",
  "blocked_reason": null,
  "metadata": {
    "source_names": [
      "NVD NGINX"
    ],
    "source_kinds": [
      "nvd-search"
    ],
    "candidate_count": 1
  }
}