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CVE-2016-6287

Estado: ModificadaAlta (7.5)—

The "http-client" egg always used a HTTP_PROXY environment variable to determine whether HTTP traffic should be routed via a proxy, even when running as a CGI process. Under several web servers this would mean a user-supplied "Proxy" header could allow an attacker to direct all HTTP requests through a proxy (also known as a "httpoxy" attack). This affects all versions of http-client before 0.10.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Call-cc — Http-client

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2016-6287",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
            }
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  "published": "2017-01-10T15:59:00.347",
  "references": [
    {
      "url": "http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.html",
      "tags": [
        "Mitigation",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/92105",
      "tags": [
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        "VDB Entry"
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      "url": "http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.html",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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        "VDB Entry"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-19"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The \"http-client\" egg always used a HTTP_PROXY environment variable to determine whether HTTP traffic should be routed via a proxy, even when running as a CGI process. Under several web servers this would mean a user-supplied \"Proxy\" header could allow an attacker to direct all HTTP requests through a proxy (also known as a \"httpoxy\" attack). This affects all versions of http-client before 0.10."
    },
    {
      "lang": "es",
      "value": "El huevo \"http-client\" siempre utilizó una variable de entorno HTTP_PROXY para determinar si el tráfico HTTP debería ser enrutado a través de un proxy, incluso cuando se ejecuta como un proceso CGI. Bajo varios servidores web esto significaría que una cabecera \"Proxy\" proporcionada por el usuario podría permitir a un atacante dirigir todas las peticiones HTTP a través de un proxy (también conocido como un ataque \"httpoxy\"). Esto afecta a todas las versiones de http-client anteriores a 0.10."
    }
  ],
  "lastModified": "2026-06-17T00:50:45.140",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "matchCriteriaId": "8F4643DE-335E-4DC9-BF19-384D07D7B8B4",
              "versionEndIncluding": "0.9"
            }
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          "operator": "OR"
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      ]
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  ],
  "sourceIdentifier": "cve@mitre.org"
}