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CVE-2009-4212

Estado: ModificadaAlta (10)—

Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the crypto library in MIT Kerberos 5 (aka krb5) 1.3 through 1.6.3, and 1.7 before 1.7.1, allow remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code by providing ciphertext with a length that is too short to be valid.

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)

MIT — KerberosMIT — Kerberos 5

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2009-4212",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 10,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
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          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
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  ],
  "published": "2010-01-13T19:30:00.607",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-189"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the crypto library in MIT Kerberos 5 (aka krb5) 1.3 through 1.6.3, and 1.7 before 1.7.1, allow remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code by providing ciphertext with a length that is too short to be valid."
    },
    {
      "lang": "es",
      "value": "Múltiples vulnerabilidades de desbordamiento de entero en la funcionalidad de desencriptado AES y RC4 en la biblioteca crypto en MIT Kerberos 5 (también conocido comokrb5) v1.3 a la v1.6.3, y 1.7 anterior a v1.7.1, permite a atacantes remotos provocar una denegación de servición (caída de demonio) o posiblemente la ejecución de código de su elección  facilitando texto cifrado (ciphertext) con un tamaño menor al válido."
    }
  ],
  "lastModified": "2026-06-16T23:13:15.220",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mit:kerberos:5-1.6.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "032730AE-1E53-4CA2-96FD-AD60CD27F3CA"
            },
            {
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  "evaluatorImpact": "Per: http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-004.txt\r\n\r\n\r\n\"Only releases krb5-1.3 and later are vulnerable, as\r\nearlier releases did not contain the functionality implemented by the\r\nvulnerable code.\r\n\r\nThis is an implementation vulnerability in MIT krb5, and is not a\r\nvulnerability in the Kerberos protocol.\"",
  "sourceIdentifier": "cve@mitre.org",
  "evaluatorSolution": "Per: http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-004.txt\r\n\r\n\r\nFIXES\r\n=====\r\n\r\n* The upcoming krb5-1.7.1 and krb5-1.6.4 releases will contain a fix\r\n  for this vulnerability.\r\n\r\n* For the krb5-1.7 release, apply the patch available at:\r\n\r\n  http://web.mit.edu/kerberos/advisories/2009-004-patch_1.7.txt\r\n\r\n  A PGP-signed patch is available at\r\n\r\n  http://web.mit.edu/kerberos/advisories/2009-004-patch_1.7.txt.asc\r\n\r\n\r\n* For the krb5-1.6 releases, apply the patch available at:\r\n\r\n  http://web.mit.edu/kerberos/advisories/2009-004-patch_1.6.3.txt\r\n\r\n  A PGP-signed patch is available at\r\n\r\n  http://web.mit.edu/kerberos/advisories/2009-004-patch_1.6.3.txt.asc\r\n\r\n* The krb5-1.6.3 patch might apply successfully to older releases.\r\n"
}