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CVE-2021-34570

Estado: ModificadaAlta (7.5)—

Multiple Phoenix Contact PLCnext control devices in versions prior to 2021.0.5 LTS are prone to a DoS attack through special crafted JSON requests.

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 (6)

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-34570",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 7.8,
          "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"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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          "confidentialityImpact": "NONE"
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        "exploitabilityScore": 3.9
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  "affected": [
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      "source": "info@cert.vde.com",
      "affectedData": [
        {
          "vendor": "Phoenix Contact",
          "product": "AXC F",
          "versions": [
            {
              "status": "affected",
              "version": "AXC F 1152 (1151412)",
              "lessThan": "2021.0.5 LTS",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "AXC F 2152 (2404267)",
              "lessThan": "2021.0.5 LTS",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "AXC F 3152 (1069208)",
              "lessThan": "2021.0.5 LTS",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "AXC F 2152 Starterkit (1046568)",
              "lessThan": "2021.0.5 LTS",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Phoenix Contact",
          "product": "RFC",
          "versions": [
            {
              "status": "affected",
              "version": "RFC 4072S (1051328)",
              "lessThan": "2021.0.5 LTS",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Phoenix Contact",
          "product": "PLCnext",
          "versions": [
            {
              "status": "affected",
              "version": "PLCnext Technology Starterkit (1188165)",
              "lessThan": "2021.0.5 LTS",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-09-27T09:15:07.750",
  "references": [
    {
      "url": "https://cert.vde.com/en/advisories/VDE-2021-029/",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "info@cert.vde.com"
    },
    {
      "url": "https://cert.vde.com/en/advisories/VDE-2021-029/",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "info@cert.vde.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
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      "lang": "en",
      "value": "Multiple Phoenix Contact PLCnext control devices in versions prior to 2021.0.5 LTS are prone to a DoS attack through special crafted JSON requests."
    },
    {
      "lang": "es",
      "value": "Múltiples dispositivos de control Phoenix Contact PLCnext en versiones anteriores a 2021.0.5 LTS, son propensos a un ataque DoS mediante peticiones JSON especialmente diseñadas"
    }
  ],
  "lastModified": "2026-06-17T03:56:08.930",
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