{
  "id": "CVE-2021-22659",
  "sourceIdentifier": "ics-cert@hq.dhs.gov",
  "published": "2021-03-25T16:15:14.040",
  "lastModified": "2021-03-31T15:56:20.927",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "Rockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus packet allowing the attacker to retrieve or modify random values in the register. If successfully exploited, this may lead to a buffer overflow resulting in a denial-of-service condition. The FAULT LED will flash RED and communications may be lost. Recovery from denial-of-service condition requires the fault to be cleared by the user."
    },
    {
      "lang": "es",
      "value": "Rockwell Automation MicroLogix 1400 versi\u00f3n 21.6 y anteriores, puede permitir a un atacante remoto no autenticado enviar un paquete Modbus especialmente dise\u00f1ado que le permita al atacante recuperar o modificar valores aleatorios en el registro. Si es explotado con \u00e9xito, esto puede conllevar a un desbordamiento del b\u00fafer que resulte en una condici\u00f3n de denegaci\u00f3n de servicio. El LED de FALLO parpadear\u00e1 en ROJO y es posible que se pierdan las comunicaciones. Una recuperaci\u00f3n de la condici\u00f3n de denegaci\u00f3n de servicio requiere que el fallo sea eliminado por usuario"
    }
  ],
  "metrics": {
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        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "HIGH",
          "baseScore": 8.6,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.7
      }
    ],
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          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5
        },
        "baseSeverity": "HIGH",
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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  },
  "weaknesses": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
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  "references": [
    {
      "url": "https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1129877/loc/en_US#__highlight",
      "source": "ics-cert@hq.dhs.gov",
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}