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CVE-2007-3149

Estado: ModificadaAlta (7.2)—

sudo, when linked with MIT Kerberos 5 (krb5), does not properly check whether a user can currently authenticate to Kerberos, which allows local users to gain privileges, in a manner unintended by the sudo security model, via certain KRB5_ environment variable settings. NOTE: another researcher disputes this vulnerability, stating that the attacker must be "a user, who can already log into your system, and can already use sudo."

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 — Kerberos 5Todd Miller — Sudo

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2007-3149",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/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": true,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2007-06-11T18:30:00.000",
  "references": [
    {
      "url": "http://secunia.com/advisories/26540",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/470739/100/0/threaded",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/470752/100/0/threaded",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/470774/100/0/threaded",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/24368",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.sudo.ws/cgi-bin/cvsweb/sudo/auth/kerb5.c",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/26540",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/470739/100/0/threaded",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/470752/100/0/threaded",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/470774/100/0/threaded",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/24368",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.sudo.ws/cgi-bin/cvsweb/sudo/auth/kerb5.c",
      "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": "sudo, when linked with MIT Kerberos 5 (krb5), does not properly check whether a user can currently authenticate to Kerberos, which allows local users to gain privileges, in a manner unintended by the sudo security model, via certain KRB5_ environment variable settings.  NOTE: another researcher disputes this vulnerability, stating that the attacker must be \"a user, who can already log into your system, and can already use sudo.\""
    },
    {
      "lang": "es",
      "value": "sudo, cuando está enlazado con MIT Kerberos 5 (krb5), no comprueba correctamente si un usuario pueda validar actualmente a Kerberos, lo cual permite a usuarios locales ganar privilegios, de una forma involuntario por el modelo de seguridad de sudo, a rtavés de ciertas variables de configuración KRB5_ environment. NOTA: Otro investigados cuestiona esta vulnerabilidad, basándose en que el atacante debe ser “un usuario, que puede registrarse en tu sistema, y puede utilizar sudo.”"
    }
  ],
  "lastModified": "2026-06-16T22:41:09.957",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mit:kerberos_5:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "589D7E39-A243-49F9-8F67-4B9E92AE87DF"
            },
            {
              "criteria": "cpe:2.3:a:todd_miller:sudo:1.6.8_p12:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "31B2C299-5D0B-44DA-91FD-4B1146BE9A7B"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "vendorComments": [
    {
      "comment": "Not vulnerable.  Versions of sudo package shipped with Red Hat Enterprise Linux versions 2.1, 3, 4 and 5 are linked with PAM support and never use libkrb5 authentication.\n",
      "lastModified": "2007-06-11T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}