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CVE-2021-43413

Estado: ModificadaAlta (8.8)—

An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access.

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)

GNU — Hurd

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-43413",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 9,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
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  ],
  "published": "2021-11-07T18:15:07.783",
  "references": [
    {
      "url": "https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.html",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
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    {
      "url": "https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.html",
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        "Vendor Advisory"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.mail-archive.com/bug-hurd%40gnu.org/msg32113.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.html",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
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      "url": "https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.html",
      "tags": [
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      "url": "https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://www.mail-archive.com/bug-hurd%40gnu.org/msg32113.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un problema en GNU Hurd versiones anteriores a 0.9 20210404-9. Un único puerto de paginación es compartido entre todos los que mapean un archivo, permitiendo a cualquiera modificar cualquier archivo que pueda leer. Esto puede ser explotado trivialmente para conseguir acceso completo de root"
    }
  ],
  "lastModified": "2026-06-17T04:10:56.433",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:gnu:hurd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F6A9E403-F3B3-4336-9A64-AEE7A1E2A0D9",
              "versionEndExcluding": "0.9.20210404-9"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "cve@mitre.org"
}