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CVE-2012-2551

Status: ModifiedMedium (5)—

The server in Kerberos in Microsoft Windows Server 2008 R2 and R2 SP1, and Windows 7 Gold and SP1, allows remote attackers to cause a denial of service (NULL pointer dereference and reboot) via a crafted session request, aka "Kerberos NULL Dereference Vulnerability."

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)

Microsoft — Windows 7Microsoft — Windows Server 2008

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2012-2551",
  "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:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "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": "2012-10-09T21:55:02.893",
  "references": [
    {
      "url": "http://secunia.com/advisories/50867",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/55778",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securitytracker.com/id?1027620",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.us-cert.gov/cas/techalerts/TA12-283A.html",
      "tags": [
        "US Government Resource"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-069",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15674",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://secunia.com/advisories/50867",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/55778",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id?1027620",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.us-cert.gov/cas/techalerts/TA12-283A.html",
      "tags": [
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-069",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15674",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The server in Kerberos in Microsoft Windows Server 2008 R2 and R2 SP1, and Windows 7 Gold and SP1, allows remote attackers to cause a denial of service (NULL pointer dereference and reboot) via a crafted session request, aka \"Kerberos NULL Dereference Vulnerability.\""
    },
    {
      "lang": "es",
      "value": "El servidor de Kerberos en Microsoft Windows Server 2008 R2 y R2 SP1 y Windows 7 Gold y SP1, permite a atacantes remotos provocar una denegación de servicio (desreferencia puntero nulo y reinicio del sistema) a través de una solicitud de sesión manipulada, también conocido como \"Vulnerabilidad de desreferencia NULL en Kerberos\""
    }
  ],
  "lastModified": "2026-06-16T23:41:40.283",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows_7:*:*:x64:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CE381783-027E-4B6D-B801-59873E5EA483"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_7:*:*:x86:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A2C3594F-7C2C-4E2D-9BC5-F4F89B7BF4D5"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_7:*:sp1:x64:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4FA15D65-7C32-4C7A-9915-746AB3F454EE"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_7:*:sp1:x86:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "976EFC05-9B37-4661-AD34-4FFDB5AB48E0"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:*:r2:itanium:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B2B19826-5516-4899-9599-F95D0A03FBCD"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:*:r2:x64:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4945F25F-2828-4D03-930B-A109BA73E00C"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "evaluatorComment": "Per: http://cwe.mitre.org/data/definitions/476.html\r\n\r\n'CWE-476: NULL Pointer Dereference'",
  "sourceIdentifier": "secure@microsoft.com"
}