« Volver al listado

CVE-2021-1285

Estado: AplazadaAlta (7.4)—

Multiple Cisco products are affected by a vulnerability in the Ethernet Frame Decoder of the Snort detection engine that could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper handling of error conditions when processing Ethernet frames. An attacker could exploit this vulnerability by sending malicious Ethernet frames through an affected device.

Leer descripción completaMostrar menos

A successful exploit could allow the attacker to exhaust disk space on the affected device, which could result in administrators being unable to log in to the device or the device being unable to boot up correctly.Note: Manual intervention is required to recover from this situation. Customers are advised to contact the Cisco Technical Assistance Center (TAC) to help recover a device in this condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:A (red adyacente) sin privilegios indica T1210. El texto describe envío de tramas Ethernet maliciosas que agotan espacio en disco, causando DoS; CWE-770 es 'Allocation of Resources Without Limits' confirmando exhaustión de recursos (T1499.004).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationFilter Network TrafficDisable or Remove Feature or Program

Tecnologías afectadas (1)

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

Cisco — SnortAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-1285",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-1285",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-11-18T16:22:37.298611Z"
        }
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "psirt@cisco.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.0",
          "baseScore": 7.4,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@cisco.com",
      "affectedData": [
        {
          "vendor": "Cisco",
          "product": "Cisco UTD SNORT IPS Engine Software",
          "versions": [
            {
              "status": "affected",
              "version": "16.12.3"
            },
            {
              "status": "affected",
              "version": "Fuji-16.9.5"
            },
            {
              "status": "affected",
              "version": "16.12.4"
            },
            {
              "status": "affected",
              "version": "17.3.1a"
            },
            {
              "status": "affected",
              "version": "16.6.6"
            },
            {
              "status": "affected",
              "version": "16.12.2"
            },
            {
              "status": "affected",
              "version": "Fuji-16.9.6"
            },
            {
              "status": "affected",
              "version": "Fuji-16.9.3"
            },
            {
              "status": "affected",
              "version": "Denali-16.3.7"
            },
            {
              "status": "affected",
              "version": "Fuji-16.9.2"
            },
            {
              "status": "affected",
              "version": "Fuji-16.9.4"
            },
            {
              "status": "affected",
              "version": "Everest-16.6.4"
            },
            {
              "status": "affected",
              "version": "Everest-16.6.3"
            },
            {
              "status": "affected",
              "version": "16.6.5"
            },
            {
              "status": "affected",
              "version": "Denali-16.3.5"
            },
            {
              "status": "affected",
              "version": "17.2.1r"
            },
            {
              "status": "affected",
              "version": "17.1.1"
            },
            {
              "status": "affected",
              "version": "Everest-16.6.2"
            },
            {
              "status": "affected",
              "version": "16.6.7a"
            },
            {
              "status": "affected",
              "version": "Denali-16.3.4"
            },
            {
              "status": "affected",
              "version": "16.6.1"
            },
            {
              "status": "affected",
              "version": "Denali-16.3.9"
            },
            {
              "status": "affected",
              "version": "Denali-16.3.3"
            },
            {
              "status": "affected",
              "version": "16.12.1a"
            },
            {
              "status": "affected",
              "version": "17.3.2"
            },
            {
              "status": "affected",
              "version": "Fuji-16.9.7"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2024-11-18T16:15:09.087",
  "references": [
    {
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-ethernet-dos-HGXgJH8n",
      "source": "psirt@cisco.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@cisco.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Multiple Cisco products are affected by a vulnerability in the Ethernet Frame Decoder of the Snort detection engine that could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition.\r\nThe vulnerability is due to improper handling of error conditions when processing Ethernet frames. An attacker could exploit this vulnerability by sending malicious Ethernet frames through an affected device. A successful exploit could allow the attacker to exhaust disk space on the affected device, which could result in administrators being unable to log in to the device or the device being unable to boot up correctly.Note: Manual intervention is required to recover from this situation. Customers are advised to contact the Cisco Technical Assistance Center (TAC) to help recover a device in this condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability."
    },
    {
      "lang": "es",
      "value": "Varios productos de Cisco se ven afectados por una vulnerabilidad en el decodificador de tramas Ethernet del motor de detección Snort que podría permitir que un atacante adyacente no autenticado provoque una condición de denegación de servicio (DoS). La vulnerabilidad se debe a un manejo inadecuado de las condiciones de error al procesar tramas Ethernet. Un atacante podría aprovechar esta vulnerabilidad enviando tramas Ethernet maliciosas a través de un dispositivo afectado. Una explotación exitosa podría permitir que el atacante agote el espacio en disco en el dispositivo afectado, lo que podría provocar que los administradores no puedan iniciar sesión en el dispositivo o que el dispositivo no pueda iniciarse correctamente. Nota: Se requiere intervención manual para recuperarse de esta situación. Se recomienda a los clientes que se comuniquen con el Centro de asistencia técnica (TAC) de Cisco para obtener ayuda para recuperar un dispositivo en esta condición. Cisco ha publicado actualizaciones de software que solucionan esta vulnerabilidad. No existen workarounds que solucionen esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T03:31:24.600",
  "sourceIdentifier": "psirt@cisco.com"
}