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CVE-2011-0091

Estado: ModificadaMedia (6.4)—

Kerberos en Microsoft Windows Server 2008 R2 y Windows 7 no impide que una sesión cambie el cifrado de alta seguridad por el cifrado DES, que permite a los atacantes "man-in-the-middle" falsificar el tráfico de la red y obtener información sensible a través de una degradación a DES, también conocido como "Vulnerabilidad de suplantación de Kerberos. "

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 (2)

Microsoft — Windows 7Microsoft — Windows Server 2008

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2011-0091",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2011-02-10T16:00:13.723",
  "references": [
    {
      "url": "http://osvdb.org/70835",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://secunia.com/advisories/43257",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://support.avaya.com/css/P8/documents/100127250",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/46140",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securitytracker.com/id?1025048",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2011/0326",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-013",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/64901",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12498",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://osvdb.org/70835",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/43257",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://support.avaya.com/css/P8/documents/100127250",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/46140",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id?1025048",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2011/0326",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-013",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/64901",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12498",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Kerberos in Microsoft Windows Server 2008 R2 and Windows 7 does not prevent a session from changing from strong encryption to DES encryption, which allows man-in-the-middle attackers to spoof network traffic and obtain sensitive information via a DES downgrade, aka \"Kerberos Spoofing Vulnerability.\""
    },
    {
      "lang": "es",
      "value": "Kerberos en Microsoft Windows Server 2008 R2 y Windows 7 no impide que una sesión cambie el cifrado de alta seguridad por el cifrado DES, que permite a los atacantes \"man-in-the-middle\" falsificar el tráfico de la red y obtener información sensible a través de una degradación a DES, también conocido como \"Vulnerabilidad de suplantación de Kerberos. \""
    }
  ],
  "lastModified": "2026-06-16T23:26:47.467",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E33796DB-4523-4F04-B564-ADF030553D51"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:r2:*:itanium:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CC916D5A-0644-4423-A52E-D4310906BE78"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:r2:*:x64:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "95DC297F-06DB-4FB3-BFB6-7312C059E047"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}