fkie_cve-2020-26241
Vulnerability from fkie_nvd
Published
2020-11-25 02:15
Modified
2024-11-21 05:19
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Summary
Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth before version 1.9.17 which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth's pre-compiled dataCopy (at 0x00...04) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls 0x00..04 with R as an argument, then overwrites R to Y, and finally invokes the RETURNDATACOPY opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed in version 1.9.17.
References
security-advisories@github.comhttps://blog.ethereum.org/2020/11/12/geth_security_release/Vendor Advisory
security-advisories@github.comhttps://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jfThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://blog.ethereum.org/2020/11/12/geth_security_release/Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jfThird Party Advisory
Impacted products
Vendor Product Version
ethereum go_ethereum *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ethereum:go_ethereum:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CCB0BFE8-F276-4F8D-AAF0-03336C90C249",
              "versionEndExcluding": "1.9.17",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Go Ethereum, or \"Geth\", is the official Golang implementation of the Ethereum protocol. This is a Consensus vulnerability in Geth before version 1.9.17 which can be used to cause a chain-split where vulnerable nodes reject the canonical chain. Geth\u0027s pre-compiled dataCopy (at 0x00...04) contract did a shallow copy on invocation. An attacker could deploy a contract that writes X to an EVM memory region R, then calls 0x00..04 with R as an argument, then overwrites R to Y, and finally invokes the RETURNDATACOPY opcode. When this contract is invoked, a consensus-compliant node would push X on the EVM stack, whereas Geth would push Y. This is fixed in version 1.9.17."
    },
    {
      "lang": "es",
      "value": "Go Ethereum, o \"Geth\", es la implementaci\u00f3n oficial Golang del protocolo Ethereum.\u0026#xa0;Esta es una vulnerabilidad de Consensus en Geth versiones anteriores a 1.9.17 que puede ser usada para causar una divisi\u00f3n de cadena donde unos nodos vulnerables rechazan la cadena can\u00f3nica.\u0026#xa0;El contrato de copia de datos precompilado de Geth (en 0x00 ... 04) hizo una copia superficial en la invocaci\u00f3n.\u0026#xa0;Un atacante podr\u00eda implementar un contrato que escribe X en una regi\u00f3n de memoria R de EVM, luego llama a 0x00..04 con R como argumento, luego sobrescribe R en Y y finalmente invoca el c\u00f3digo de operaci\u00f3n RETURNDATACOPY.\u0026#xa0;Cuando este contrato es invocado, un nodo consensus-compliant empujar\u00eda X en la pila de EVM, mientras que Geth empujar\u00eda Y. Esto es corregido en la versi\u00f3n 1.9.17"
    }
  ],
  "id": "CVE-2020-26241",
  "lastModified": "2024-11-21T05:19:37.783",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.5,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-11-25T02:15:11.047",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://blog.ethereum.org/2020/11/12/geth_security_release/"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jf"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://blog.ethereum.org/2020/11/12/geth_security_release/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jf"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-682"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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