ubuntu-cve-2014-3556
Vulnerability from osv_ubuntu
Published
2014-12-29 20:59
Modified
2025-07-16 04:50
Summary
Details

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.

Severity
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "nginx",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-core-dbg",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-doc",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-extras-dbg",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-full-dbg",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-light-dbg",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-naxsi",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-naxsi-dbg",
            "binary_version": "1.4.6-1ubuntu3"
          },
          {
            "binary_name": "nginx-naxsi-ui",
            "binary_version": "1.4.6-1ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.4.6-1ubuntu3?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.6-1ubuntu3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.1-3ubuntu1",
        "1.4.3-2ubuntu1",
        "1.4.4-1ubuntu1",
        "1.4.4-2ubuntu1",
        "1.4.4-4ubuntu1",
        "1.4.5-1ubuntu1",
        "1.4.6-1ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2014-3556",
  "modified": "2025-07-16T04:50:31Z",
  "published": "2014-12-29T20:59:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2014-3556"
    },
    {
      "type": "REPORT",
      "url": "http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2014-3556"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2014-3556"
  ],
  "withdrawn": "2025-07-18T16:43:02Z"
}



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