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CVE-2020-35962

Estado: ModificadaAlta (7.5)—

The sellTokenForLRC function in the vault protocol in the smart contract implementation for Loopring (LRC), an Ethereum token, lacks access control for fee swapping and thus allows price manipulation.

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 (1)

Loopring — Loopring

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-35962",
  "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": "Primary",
        "source": "nvd@nist.gov",
        "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": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-01-03T07:15:13.770",
  "references": [
    {
      "url": "https://blocksecteam.medium.com/loopring-lrc-protocol-incident-66e9470bd51f",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://etherscan.io/address/0x4b89f8996892d137c3de1312d1dd4e4f4ffca171",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://blocksecteam.medium.com/loopring-lrc-protocol-incident-66e9470bd51f",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://etherscan.io/address/0x4b89f8996892d137c3de1312d1dd4e4f4ffca171",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The sellTokenForLRC function in the vault protocol in the smart contract implementation for Loopring (LRC), an Ethereum token, lacks access control for fee swapping and thus allows price manipulation."
    },
    {
      "lang": "es",
      "value": "La función sellTokenForLRC en el protocolo vault en la implementación del contrato inteligente para Loopring (LRC), un token de Ethereum, carece de control de acceso para el intercambio de tarifas y, por lo tanto, permite la manipulación de precios."
    }
  ],
  "lastModified": "2026-06-17T03:14:40.427",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:loopring:loopring:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1C93F14E-AC12-4E5F-8318-6491A50E2217"
            }
          ],
          "operator": "OR"
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  "sourceIdentifier": "cve@mitre.org"
}