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CVE-2021-43839

Estado: ModificadaAlta (7.5)—

Cronos is a commercial implementation of a blockchain. In Cronos nodes running versions before v0.6.5, it is possible to take transaction fees from Cosmos SDK's FeeCollector for the current block by sending a custom crafted MsgEthereumTx. This problem has been patched in Cronos v0.6.5. There are no tested workarounds. All validator node operators are recommended to upgrade to Cronos v0.6.5 at their earliest possible convenience.

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 (3)

Crypto — CronosCrypto — EthermintCrypto — Evmos

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-43839",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "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:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "crypto-org-chain",
          "product": "cronos",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.6.5"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-21T17:15:08.413",
  "references": [
    {
      "url": "https://github.com/crypto-org-chain/cronos/commit/150ef237b37ac28c8136e1c0f494932860b9ebe8",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/crypto-org-chain/cronos/pull/270",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/crypto-org-chain/cronos/security/advisories/GHSA-f854-hpxv-cw9r",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/crypto-org-chain/cronos/commit/150ef237b37ac28c8136e1c0f494932860b9ebe8",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/crypto-org-chain/cronos/pull/270",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/crypto-org-chain/cronos/security/advisories/GHSA-f854-hpxv-cw9r",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-670"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-670"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cronos is a commercial implementation of a blockchain. In Cronos nodes running versions before v0.6.5, it is possible to take transaction fees from Cosmos SDK's FeeCollector for the current block by sending a custom crafted MsgEthereumTx. This problem has been patched in Cronos v0.6.5. There are no tested workarounds. All validator node operators are recommended to upgrade to Cronos v0.6.5 at their earliest possible convenience."
    },
    {
      "lang": "es",
      "value": "Cronos es una implementación comercial de una cadena de bloques. En los nodos de Cronos que ejecutan versiones anteriores a la v0.6.5, es posible tomar las tasas de transacción del FeeCollector de Cosmos SDK para el bloque actual mediante el envío de un MsgEthereumTx diseñado a medida. Este problema ha sido parcheado en Cronos versión v0.6.5. No se presentan soluciones probadas. Se recomienda a todos los operadores de nodos comprobadores que actualicen a Cronos versión v0.6.5 lo antes posible"
    }
  ],
  "lastModified": "2026-06-17T04:11:32.783",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:crypto:cronos:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E9F28A36-C787-45D6-A501-6957F4D5B99D",
              "versionEndExcluding": "0.6.5"
            },
            {
              "criteria": "cpe:2.3:a:crypto:ethermint:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9815D335-02A9-4434-8BEE-21439F2B4834",
              "versionEndExcluding": "0.7.3"
            },
            {
              "criteria": "cpe:2.3:a:crypto:ethermint:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "26CC9F8A-86F5-4A0C-A296-AFF2E4676CD9",
              "versionEndIncluding": "0.9.0",
              "versionStartIncluding": "0.8.0"
            },
            {
              "criteria": "cpe:2.3:a:crypto:evmos:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "69E649A1-3CB0-491E-8E0E-D0C4205A4701",
              "versionEndIncluding": "0.4.2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}