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CVE-2020-25577

Estado: ModificadaCrítica (9.8)—

In FreeBSD 12.2-STABLE before r368250, 11.4-STABLE before r368253, 12.2-RELEASE before p1, 12.1-RELEASE before p11 and 11.4-RELEASE before p5 rtsold(8) does not verify that the RDNSS option does not extend past the end of the received packet before processing its contents. While the kernel currently ignores such malformed packets, it passes them to userspace programs. Any programs expecting the kernel to do validation may be vulnerable to an overflow.

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-2020-25577",
  "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
      }
    ],
    "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": "n/a",
          "product": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "FreeBSD 12.2-RELEASE before p1, 12.1-RELEASE before p11, 11.4-RELEASE before p5"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-03-29T20:15:12.860",
  "references": [
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:32.rtsold.asc",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secteam@freebsd.org"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20210423-0001/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "secteam@freebsd.org"
    },
    {
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:32.rtsold.asc",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20210423-0001/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In FreeBSD 12.2-STABLE before r368250, 11.4-STABLE before r368253, 12.2-RELEASE before p1, 12.1-RELEASE before p11 and 11.4-RELEASE before p5 rtsold(8) does not verify that the RDNSS option does not extend past the end of the received packet before processing its contents. While the kernel currently ignores such malformed packets, it passes them to userspace programs. Any programs expecting the kernel to do validation may be vulnerable to an overflow."
    },
    {
      "lang": "es",
      "value": "En FreeBSD versiones 12.2-STABLE anteriores a r368250, versiones 11.4-STABLE anteriores a r368253, versiones 12.2-RELEASE anteriores a p1, versiones 12.1-RELEASE anteriores a p11 y  versiones 11.4-RELEASE anteriores a p5 rtsold(8), no verifica que la opción RDNSS no se extienda más allá del final del paquete recibido antes de procesar su contenido. Si bien el kernel actualmente ignora estos paquetes malformados, los pasa a los programas del espacio de usuario. Cualquier programa que espera al kernel para hacer una comprobación puede ser vulnerable a un desbordamiento"
    }
  ],
  "lastModified": "2026-06-17T03:06:55.270",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*",
              "vulnerable": true,
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            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "9FCA6A72-2A72-45FD-A43D-B5BF7C329121"
            },
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            },
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            },
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              "matchCriteriaId": "B5D692EF-A5D7-430E-91BA-4CD137343B66"
            },
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              "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p3:*:*:*:*:*:*",
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            },
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              "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p4:*:*:*:*:*:*",
              "vulnerable": true,
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            },
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              "vulnerable": true,
              "matchCriteriaId": "402740C4-5B55-423F-BAD2-F742E1E21ADC"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9DCAA10A-C612-45E0-84B7-55897F49D65E"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p7:*:*:*:*:*:*",
              "vulnerable": true,
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            },
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              "criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p8:*:*:*:*:*:*",
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  ],
  "sourceIdentifier": "secteam@freebsd.org"
}