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CVE-2011-3187

Estado: ModificadaMedia (4.3)—

The to_s method in actionpack/lib/action_dispatch/middleware/remote_ip.rb in Ruby on Rails 3.0.5 does not validate the X-Forwarded-For header in requests from IP addresses on a Class C network, which might allow remote attackers to inject arbitrary text into log files or bypass intended address parsing via a crafted header.

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)

Rubyonrails — Rails

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2011-3187",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2011-08-29T18:55:01.707",
  "references": [
    {
      "url": "http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0337.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://webservsec.blogspot.com/2011/02/ruby-on-rails-vulnerability.html",
      "tags": [
        "Exploit"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/08/17/1",
      "tags": [
        "Patch"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/08/19/11",
      "tags": [
        "Patch"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/08/20/1",
      "tags": [
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      ],
      "source": "secalert@redhat.com"
    },
    {
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      "tags": [
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    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/08/22/14",
      "tags": [
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    },
    {
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      "tags": [
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      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.novell.com/show_bug.cgi?id=673010",
      "tags": [
        "Exploit"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0337.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://webservsec.blogspot.com/2011/02/ruby-on-rails-vulnerability.html",
      "tags": [
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      "tags": [
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    },
    {
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      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/08/20/1",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/08/22/13",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/08/22/14",
      "tags": [
        "Exploit"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/08/22/5",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.novell.com/show_bug.cgi?id=673010",
      "tags": [
        "Exploit"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The to_s method in actionpack/lib/action_dispatch/middleware/remote_ip.rb in Ruby on Rails 3.0.5 does not validate the X-Forwarded-For header in requests from IP addresses on a Class C network, which might allow remote attackers to inject arbitrary text into log files or bypass intended address parsing via a crafted header."
    },
    {
      "lang": "es",
      "value": "El método to_s en actionpack/lib/action_dispatch/middleware/remote_ip.rb en Ruby on Rails v3.0.5 no valida la cabecera X-Forwarded-For de las peticiones de direcciones IP en una red de Clase C, lo que podría permitir a atacantes remotos la ejecución de documentos de texto en los archivos de registro o evitar análisis de direcciones intencionadas a través de una cabecera modificada."
    }
  ],
  "lastModified": "2026-06-16T23:32:49.797",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rubyonrails:rails:3.0.5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "392E2D58-CB39-4832-B4D9-9C2E23B8E14C"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}