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CVE-2020-7453

Estado: ModificadaMedia (6)—

In FreeBSD 12.1-STABLE before r359021, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r359020, and 11.3-RELEASE before 11.3-RELEASE-p7, a missing null termination check in the jail_set configuration option "osrelease" may return more bytes with a subsequent jail_get system call allowing a malicious jail superuser with permission to create nested jails to read kernel memory.

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)

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{
  "id": "CVE-2020-7453",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 3.3,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.4,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 0.8
      }
    ]
  },
  "affected": [
    {
      "source": "secteam@freebsd.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "12.1-STABLE before r359021, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r359020, 11.3-RELEASE before 11.3-RELEASE-p7"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-04-29T00:15:12.093",
  "references": [
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:08.jail.asc",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secteam@freebsd.org"
    },
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:08.jail.asc",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In FreeBSD 12.1-STABLE before r359021, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r359020, and 11.3-RELEASE before 11.3-RELEASE-p7, a missing null termination check in the jail_set configuration option \"osrelease\" may return more bytes with a subsequent jail_get system call allowing a malicious jail superuser with permission to create nested jails to read kernel memory."
    },
    {
      "lang": "es",
      "value": "En FreeBSD versiones 12.1-ESTABLE anteriores a r359021, versiones 12.1-RELEASE anteriores a 12.1-RELEASE-p3, versiones 11.3-ESTABLE anteriores a r359020 y versiones 11.3-RELEASE anteriores a 11.3-RELEASE-p7, una falta de comprobación de terminación null en la opción de configuración \"osrelease\" de jail_set puede devolver más bytes con una llamada posterior al sistema jail_get que permite a un superusuario de jaula (jail) malicioso con permiso para crear jaulas (jails) anidadas leer la memoria del kernel."
    }
  ],
  "lastModified": "2026-06-17T03:24:48.703",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F35957CE-AF9F-40CA-BDD1-FA6A0E73783F"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EA929713-B797-494A-853D-C121D9D69519"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3C3D8EDC-91D3-45B2-AC1D-EF4346D4A714"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EA5006FF-06A5-4D95-BF5B-29F26248D11F"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A705031B-FD63-4076-B92E-E826E11D7111"
            },
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              "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "11C1EFB1-68E5-45F4-A7E1-744574F290D1"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "25F649A7-9265-4552-8934-BCE083363982"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BD730B6A-F123-4685-ACB3-4F20AAAB77F3"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "508150E3-2C0C-4EEB-BFC9-BB5CEB404C06"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B5D692EF-A5D7-430E-91BA-4CD137343B66"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secteam@freebsd.org"
}