FKIE_CVE-2014-3556

Vulnerability from fkie_nvd - Published: 2014-12-29 20:59 - Updated: 2026-06-17 00:08
Severity
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.
References
secalert@redhat.comhttp://mailman.nginx.org/pipermail/nginx-announce/2014/000144.htmlPatch, Vendor Advisory
secalert@redhat.comhttp://marc.info/?l=bugtraq&m=142103967620673&w=2Issue Tracking, Third Party Advisory
secalert@redhat.comhttp://nginx.org/download/patch.2014.starttls.txtPatch, Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1126891Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.htmlPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=142103967620673&w=2Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://nginx.org/download/patch.2014.starttls.txtPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1126891Issue Tracking, Third Party Advisory
Impacted products
Vendor Product Version
f5 nginx *
f5 nginx *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "091FA427-14F1-480B-9AF7-BEDE2B95F554",
              "versionEndExcluding": "1.6.1",
              "versionStartIncluding": "1.5.6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E907E772-8057-4A01-97E5-B930769CFAD2",
              "versionEndExcluding": "1.7.4",
              "versionStartIncluding": "1.7.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "La implementaci\u00f3n STARTTLS en mail/ngx_mail_smtp_handler.c en el proxy SMTP en nginx 1.5.x y 1.6.x anterior a 1.6.1 y 1.7.x anterior a 1.7.4 no restringe adecuadamente el buffer I/O, lo que permite ataques man-in-the-middle insertar comandos en sesiones cifradas SMTP enviando el comando cleartext que se procesa despu\u00e9s que TLS, relacionado a un ataque \u0027inyecci\u00f3n de comando de texto plano\u0027, un problema similar a CVE-2011-0411"
    }
  ],
  "id": "CVE-2014-3556",
  "lastModified": "2026-06-17T00:08:28.650",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2014-12-29T20:59:03.943",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "http://marc.info/?l=bugtraq\u0026m=142103967620673\u0026w=2"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "http://nginx.org/download/patch.2014.starttls.txt"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1126891"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "http://marc.info/?l=bugtraq\u0026m=142103967620673\u0026w=2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "http://nginx.org/download/patch.2014.starttls.txt"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1126891"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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