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CVE-2016-2166

Status: ModifiedMedium (6.5)—

The (1) proton.reactor.Connector, (2) proton.reactor.Container, and (3) proton.utils.BlockingConnection classes in Apache Qpid Proton before 0.12.1 improperly use an unencrypted connection for an amqps URI scheme when SSL support is unavailable, which might allow man-in-the-middle attackers to obtain sensitive information or modify data via unspecified vectors.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Apache — Qpid ProtonFedoraproject — Fedora

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2016-2166",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 5.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 4.9,
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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        "userInteractionRequired": false
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          "attackVector": "NETWORK",
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          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 4.2,
        "exploitabilityScore": 2.2
      }
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  "affected": [
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      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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  ],
  "published": "2016-04-12T14:59:11.183",
  "references": [
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      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182414.html",
      "tags": [
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    {
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      "source": "secalert@redhat.com"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
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    {
      "lang": "en",
      "value": "The (1) proton.reactor.Connector, (2) proton.reactor.Container, and (3) proton.utils.BlockingConnection classes in Apache Qpid Proton before 0.12.1 improperly use an unencrypted connection for an amqps URI scheme when SSL support is unavailable, which might allow man-in-the-middle attackers to obtain sensitive information or modify data via unspecified vectors."
    },
    {
      "lang": "es",
      "value": "Las clases (1) proton.reactor.Connector, (2) proton.reactor.Container y (3) proton.utils.BlockingConnection en Apache Qpid Proton en versiones anteriores a 0.12.1 usan de forma incorrecta una conexión cifrada para un esquema URI amqps cuando el soporte SSL no está disponible, lo que podría permitir a atacantes man-in-the-middle obtener información sensible o modificar datos a través de vectores no especificados."
    }
  ],
  "lastModified": "2026-06-17T00:43:34.187",
  "configurations": [
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        {
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  "sourceIdentifier": "secalert@redhat.com"
}