« Volver al listado

CVE-2020-5135

Estado: AnalizadaCrítica (9.8)⚠ Explotación activa

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.

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).

CISA KEV — explotada activamente

🎯 Técnicas ATT&CK

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

Buffer overflow en firewall remoto sin autenticación (AV:N/PR:N) permite ejecución arbitraria de código (I:H) y DoS (A:H). Explotación activa conocida en ransomware.

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

Privileged Account ManagementFilter Network TrafficVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software Installation

Tecnologías afectadas (2)

Sonicwall — SonicosSonicwall — Sonicosv

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2020-5135",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2020-5135",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-02-06T19:55:08.576470Z"
        }
      }
    ],
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "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
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "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": "PSIRT@sonicwall.com",
      "affectedData": [
        {
          "vendor": "SonicWall",
          "product": "SonicOS",
          "versions": [
            {
              "status": "affected",
              "version": "SonicOS 6.5.4.7-79n and earlier"
            },
            {
              "status": "affected",
              "version": "SonicOS 6.5.1.11-4n and earlier"
            },
            {
              "status": "affected",
              "version": "SonicOS 6.0.5.3-93o and earlier"
            },
            {
              "status": "affected",
              "version": "SonicOSv 6.5.4.4-44v-21-794 and earlier"
            },
            {
              "status": "affected",
              "version": "SonicOS 7.0.0.0-1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-10-12T11:15:12.747",
  "references": [
    {
      "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "PSIRT@sonicwall.com"
    },
    {
      "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5135",
      "tags": [
        "US Government Resource"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "PSIRT@sonicwall.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento del búfer en SonicOS, permite a un atacante remoto causar una Denegación de servicio (DoS) y ejecutar potencialmente código arbitrario mediante el envío de una petición maliciosa al firewall. Esta vulnerabilidad afectó a SonicOS Gen 6 versiones 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv versión 6.5.4.v y Gen 7 versión 7.0.0.0"
    }
  ],
  "lastModified": "2026-06-17T03:20:57.470",
  "cisaActionDue": "2022-04-05",
  "cisaExploitAdd": "2022-03-15",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3937590E-0915-4FA8-AE69-A5197A839931",
              "versionEndIncluding": "6.0.5.3"
            },
            {
              "criteria": "cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "08DF961E-08DD-47EC-9AB1-3A3FF79E1F7A",
              "versionEndIncluding": "6.5.1.11",
              "versionStartIncluding": "6.5.0.0"
            },
            {
              "criteria": "cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8302038F-FA49-4CF2-B064-3EE1103B99F1",
              "versionEndIncluding": "6.5.4.7",
              "versionStartIncluding": "6.5.4.0"
            },
            {
              "criteria": "cpe:2.3:o:sonicwall:sonicos:7.0.0.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "05C0300F-44AB-482C-BA6D-B9F2ED77037A"
            },
            {
              "criteria": "cpe:2.3:o:sonicwall:sonicosv:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8BBB86A1-803B-4B76-BF3D-4A9BCC5AD302",
              "versionEndIncluding": "6.5.4.4"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "PSIRT@sonicwall.com",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "SonicWall SonicOS Buffer Overflow Vulnerability"
}