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CVE-2021-20612

Status: ModifiedHigh (7.5)—

Lack of administrator control over security vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.14 and prior, FX3U-ENET-L Firmware version 1.14 and prior and FX3U-ENET-P502 Firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in communication function of the product or other unspecified effects by sending specially crafted packets to an unnecessary opening of TCP port. Control by MELSEC-F series PLC is not affected by this vulnerability, but system reset is required for recovery.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (3)

Mitsubishielectric — Fx3u-enet-l FirmwareMitsubishielectric — Fx3u-enet-p502 FirmwareMitsubishielectric — Fx3u-enet Firmware

CWEs

References

Raw JSON (NVD)

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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
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        "obtainAllPrivilege": false,
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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  "affected": [
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      "affectedData": [
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  "published": "2022-01-14T20:15:09.850",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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      "value": "Lack of administrator control over security vulnerability in MELSEC-F series FX3U-ENET Firmware version 1.14 and prior, FX3U-ENET-L Firmware version 1.14 and prior and FX3U-ENET-P502 Firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition in communication function of the product or other unspecified effects by sending specially crafted packets to an unnecessary opening of TCP port. Control by MELSEC-F series PLC is not affected by this vulnerability, but system reset is required for recovery."
    },
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      "lang": "es",
      "value": "Una falta de control del administrador sobre la vulnerabilidad de seguridad en la serie MELSEC-F FX3U-ENET Firmware versión 1.14 y anteriores, FX3U-ENET-L Firmware versión 1.14 y anteriores y FX3U-ENET-P502 Firmware versión 1.14 y anteriores permite que un atacante remoto no autenticado cause una condición de denegación de servicio (DoS) en la función de comunicación del producto u otros efectos no especificados mediante el envío de paquetes especialmente diseñados a una apertura no necesaria del puerto TCP. El control por parte del PLC de la serie MELSEC-F no está afectado por esta vulnerabilidad, pero es necesario reiniciar el sistema para recuperarlo"
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