{
  "id": "CVE-2021-33720",
  "sourceIdentifier": "productcert@siemens.com",
  "published": "2021-09-14T11:15:24.540",
  "lastModified": "2021-12-14T20:58:08.967",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). Specially crafted packets sent to port 4443/tcp could cause a Denial-of-Service condition."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad en los rel\u00e9s SIPROTEC 5 con variantes de CPU CP050 (Todas las versiones anteriores a V8.80), rel\u00e9s SIPROTEC 5 con variantes de CPU CP100 (Todas las versiones anteriores a V8.80), rel\u00e9s SIPROTEC 5 con variantes de CPU CP300 (Todas las versiones anteriores a V8.80). Los paquetes especialmente dise\u00f1ados enviados al puerto 4443/tcp podr\u00edan causar una condici\u00f3n de denegaci\u00f3n de servicio"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    },
    {
      "source": "productcert@siemens.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp050:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "8.80",
              "matchCriteriaId": "9755644C-32A9-468D-A7AD-D12B8C1924D9"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp100:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "8.80",
              "matchCriteriaId": "27B5603D-CA86-440D-9CBE-A6F50AA1ADE1"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp300:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "8.80",
              "matchCriteriaId": "23382FCC-10D8-4DEC-A6B1-9B39D8988299"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf",
      "source": "productcert@siemens.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}