{
  "id": "CVE-2021-42766",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-10-20T20:15:07.517",
  "lastModified": "2021-10-26T19:36:00.247",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "The Proof-of-Stake (PoS) Ethereum consensus protocol through 2021-10-19 allows an adversary to cause a denial of service (long-range consensus chain reorganizations), even when this adversary has little stake and cannot influence network message propagation. This can cause a protocol stall, or an increase in the profits of individual validators."
    },
    {
      "lang": "es",
      "value": "El protocolo de consenso Proof-of-Stake (PoS) de Ethereum versiones hasta el 19-10-2021, permite a un adversario causar una denegaci\u00f3n de servicio (reorganizaciones de la cadena de consenso de largo alcance), incluso cuando este adversario presenta poco inter\u00e9s y no puede influir en la propagaci\u00f3n de los mensajes de la red. Esto puede causar una paralizaci\u00f3n del protocolo, o un aumento de las ganancias de los comprobadores individuales"
    }
  ],
  "metrics": {
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          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL"
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        "exploitabilityScore": 3.9,
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          "accessVector": "NETWORK",
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          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
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          "baseScore": 6.4
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
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        "acInsufInfo": false,
        "obtainAllPrivilege": false,
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        "obtainOtherPrivilege": false,
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  "weaknesses": [
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      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "NVD-CWE-noinfo"
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  "configurations": [
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              "vulnerable": true,
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  "references": [
    {
      "url": "https://arxiv.org/abs/2110.10086",
      "source": "cve@mitre.org",
      "tags": [
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      ]
    }
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}