« Volver al listado

CVE-2023-3326

Estado: ModificadaCrítica (9.8)—

pam_krb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on the system, pam_krb5 has no way to validate the response from the KDC, and essentially trusts the tgt provided over the network as being valid. In a non-default FreeBSD installation that leverages pam_krb5 for authentication and does not have a keytab provisioned, an attacker that is able to control both the password and the KDC responses can return a valid tgt, allowing authentication to occur for any user on the system.

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 (1)

Freebsd — Freebsd

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-3326",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-3326",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-12-05T17:45:11.407919Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "secteam@freebsd.org",
      "affectedData": [
        {
          "vendor": "FreeBSD",
          "modules": [
            "pam_krb5"
          ],
          "product": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "13.2-RELEASE",
              "lessThan": "13.2-RELEASE-p1",
              "versionType": "release"
            },
            {
              "status": "affected",
              "version": "13.1-RELEASE",
              "lessThan": "13.1-RELEASE-p8",
              "versionType": "release"
            },
            {
              "status": "affected",
              "version": "12.4-RELEASE",
              "lessThan": "12.4-RELEASE-p3",
              "versionType": "release"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2023-06-22T17:15:44.833",
  "references": [
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "secteam@freebsd.org"
    },
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc",
      "source": "secteam@freebsd.org"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20230714-0005/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "secteam@freebsd.org"
    },
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20230714-0005/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secteam@freebsd.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-303"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "pam_krb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on the system, pam_krb5 has no way to validate the response from the KDC, and essentially trusts the tgt provided over the network as being valid. In a non-default FreeBSD installation that leverages pam_krb5 for authentication and does not have a keytab provisioned, an attacker that is able to control both the password and the KDC responses can return a valid tgt, allowing authentication to occur for any user on the system.\n"
    }
  ],
  "lastModified": "2026-06-17T06:13:49.523",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A7F6C8B0-9D75-476C-ADBA-754416FBC186",
              "versionEndExcluding": "12.4"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D79AAEBE-0D5A-4C9C-95FD-6287A53EE1C0",
              "versionEndExcluding": "13.1",
              "versionStartIncluding": "13.0"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "24920B4D-96C0-401F-B679-BEB086760EAF"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3CE32730-A9F5-4E8D-BDA4-6B8232F84787"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "552E81DE-D409-475F-8ED0-E10A0BE43D29"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:rc2-p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BA821886-B26B-47A6-ABC9-B8F70CE0ACFB"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.4:rc2-p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "220629AD-32CC-4303-86AE-1DD27F0E4C65"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DEEE6D52-27E4-438D-AE8D-7141320B5973"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:b1-p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "66364EA4-83B1-4597-8C18-D5633B361A9C"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:b2-p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EF9292DD-EFB1-4B50-A941-7485D901489F"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EFB18F55-4F5C-4166-9A7E-6F6617179A90"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "66E1C269-841F-489A-9A0A-5D145B417E0A"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:p3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "ECF1B567-F764-45F5-A793-BEA93720F952"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:p4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DAFE3F33-2C57-4B52-B658-82572607BD8C"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:p5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C925DF75-2785-44BD-91CA-66D29C296689"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:p6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BCE2DAEC-81A5-49E9-B7E7-4F143FA6B3F7"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:p7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7725D503-1437-4F90-B30C-007193D5F0E1"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.1:rc1-p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B536EE52-ED49-4A85-BC9D-A27828D5A961"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A87EFA20-DD6B-41C5-98FD-A29F67D2E732"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secteam@freebsd.org"
}