FKIE_CVE-2011-3416

Vulnerability from fkie_nvd - Published: 2011-12-30 01:55 - Updated: 2026-06-16 23:33
Severity
Summary
The Forms Authentication feature in the ASP.NET subsystem in Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5 SP1, 3.5.1, and 4.0 allows remote authenticated users to obtain access to arbitrary user accounts via a crafted username, aka "ASP.Net Forms Authentication Bypass Vulnerability."
References
secure@microsoft.comhttp://www.us-cert.gov/cas/techalerts/TA11-347A.htmlUS Government Resource
secure@microsoft.comhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-100
secure@microsoft.comhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14363
af854a3a-2127-422b-91ae-364da2661108http://www.us-cert.gov/cas/techalerts/TA11-347A.htmlUS Government Resource
af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-100
af854a3a-2127-422b-91ae-364da2661108https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14363
Impacted products
Vendor Product Version
microsoft windows_7 -
microsoft windows_7 -
microsoft windows_7 -
microsoft windows_server_2003 *
microsoft windows_server_2008 *
microsoft windows_server_2008 *
microsoft windows_server_2008 -
microsoft windows_server_2008 -
microsoft windows_server_2008 r2
microsoft windows_vista *
microsoft windows_vista -
microsoft windows_xp *
microsoft windows_xp sp3
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "E33796DB-4523-4F04-B564-ADF030553D51",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_7:-:sp1:x64:*:*:*:*:*",
              "matchCriteriaId": "F282E5E8-A5C9-4092-B0BF-07A5A2CAA6F4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_7:-:sp1:x86:*:*:*:*:*",
              "matchCriteriaId": "D16A8D29-57BF-4B74-85F2-24DBD8B52BBF",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*",
              "matchCriteriaId": "4D3B5E4F-56A6-4696-BBB4-19DF3613D020",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:*:r2:x64:*:*:*:*:*",
              "matchCriteriaId": "4945F25F-2828-4D03-930B-A109BA73E00C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:*:sp2:itanium:*:*:*:*:*",
              "matchCriteriaId": "7C684420-1614-4DAE-9BD9-F1FE9102A50F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x64:*:*:*:*:*",
              "matchCriteriaId": "2C9B0563-D613-497D-8F2E-515E6DA00CA5",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "BA99C751-91CB-43D4-93FF-1C12342CAF1E",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "CC916D5A-0644-4423-A52E-D4310906BE78",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*",
              "matchCriteriaId": "0A0D2704-C058-420B-B368-372D1129E914",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*",
              "matchCriteriaId": "BF1AD1A1-EE20-4BCE-9EE6-84B27139811C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_xp:*:sp2:professional_x64:*:*:*:*:*",
              "matchCriteriaId": "1AB9988B-5A9C-4F6D-BCCC-4D03AC6E4CF9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_xp:sp3:unknown:english:*:*:*:*:*",
              "matchCriteriaId": "78995D27-1EE0-4983-A6A4-BB89B49475E0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Forms Authentication feature in the ASP.NET subsystem in Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5 SP1, 3.5.1, and 4.0 allows remote authenticated users to obtain access to arbitrary user accounts via a crafted username, aka \"ASP.Net Forms Authentication Bypass Vulnerability.\""
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n de autenticaci\u00f3n de formularios en el subsistema de ASP.NET de Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5 SP1, 3.5.1 y 4.0 permite a usuarios remotos autenticados obtener acceso a cuentas de usuario de su elecci\u00f3n mediante un nombre de usuario hecha a mano, tambi\u00e9n conocido como \"Formas de autenticaci\u00f3n ASP.Net de Bypass de vulnerabilidad\"."
    }
  ],
  "id": "CVE-2011-3416",
  "lastModified": "2026-06-16T23:33:15.450",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 8.5,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:M/Au:S/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 6.8,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2011-12-30T01:55:01.093",
  "references": [
    {
      "source": "secure@microsoft.com",
      "tags": [
        "US Government Resource"
      ],
      "url": "http://www.us-cert.gov/cas/techalerts/TA11-347A.html"
    },
    {
      "source": "secure@microsoft.com",
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-100"
    },
    {
      "source": "secure@microsoft.com",
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14363"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "US Government Resource"
      ],
      "url": "http://www.us-cert.gov/cas/techalerts/TA11-347A.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-100"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14363"
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.