« Volver al listado

CVE-2024-6640

Estado: AplazadaMedia (6.3)—

In ICMPv6 Neighbor Discovery (ND), the ID is always 0. When pf is configured to allow ND and block incoming Echo Requests, a crafted Echo Request packet after a Neighbor Solicitation (NS) can trigger an Echo Reply. The packet has to come from the same host as the NS and have a zero as identifier to match the state created by the Neighbor Discovery and allow replies to be generated.

ICMPv6 packets with identifier value of zero bypass firewall rules written on the assumption that the incoming packets are going to create a state in the state table.

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)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Openbsd — PFAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2024-6640",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-6640",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-08-13T18:58:37.288194Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "secteam@freebsd.org",
      "affectedData": [
        {
          "vendor": "FreeBSD",
          "modules": [
            "pf"
          ],
          "product": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "14.1-RELEASE",
              "lessThan": "p3",
              "versionType": "release"
            },
            {
              "status": "affected",
              "version": "14.0-RELEASE",
              "lessThan": "p9",
              "versionType": "release"
            },
            {
              "status": "affected",
              "version": "13.3-RELEASE",
              "lessThan": "p5",
              "versionType": "release"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2024-08-12T13:38:39.380",
  "references": [
    {
      "url": "https://security.freebsd.org/advisories/FreeBSD-SA-24:05.pf.asc",
      "source": "secteam@freebsd.org"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20240816-0008/",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-276"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In ICMPv6 Neighbor Discovery (ND), the ID is always 0.  When pf is configured to allow ND and block incoming Echo Requests, a crafted Echo Request packet after a Neighbor Solicitation (NS) can trigger an Echo Reply.  The packet has to come from the same host as the NS and have a zero as identifier to match the state created by the Neighbor Discovery and allow replies to be generated.\n\nICMPv6 packets with identifier value of zero bypass firewall rules written on the assumption that the incoming packets are going to create a state in the state table."
    },
    {
      "lang": "es",
      "value": "En ICMPv6 Neighbor Discovery (ND), el ID es siempre 0. Cuando pf está configurado para permitir ND y bloquear solicitudes de eco entrantes, un paquete de solicitud de eco manipulado después de una solicitud de vecino (NS) puede desencadenar una respuesta de eco. El paquete debe provenir del mismo host que el NS y tener un cero como identificador para coincidir con el estado creado por Neighbor Discovery y permitir que se generen respuestas. Paquetes ICMPv6 con valor de identificador de reglas de firewall de omisión cero escritos bajo el supuesto de que los paquetes entrantes crearán un estado en la tabla de estados."
    }
  ],
  "lastModified": "2026-06-17T08:18:23.953",
  "sourceIdentifier": "secteam@freebsd.org"
}