{
  "id": "CVE-2020-8904",
  "sourceIdentifier": "cve-coordination@google.com",
  "published": "2020-08-12T19:15:14.593",
  "lastModified": "2024-11-21T05:39:39.700",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An arbitrary memory overwrite vulnerability in the trusted memory of Asylo exists in versions prior to 0.6.0. As the ecall_restore function fails to validate the range of the output_len pointer, an attacker can manipulate the tmp_output_len value and write to an arbitrary location in the trusted (enclave) memory. We recommend updating Asylo to version 0.6.0 or later."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de sobrescritura de memoria arbitraria en la memoria confiable de Asylo en versiones anteriores a 0.6.0. Como la funci\u00f3n ecall_restore presenta un fallo al comprobar el rango del puntero output_len, un atacante puede manipular el valor tmp_output_len y escribir en una ubicaci\u00f3n arbitraria en la memoria confiable (enclave). Recomendamos actualizar Asylo en las versiones 0.6. 0 o posteriores"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "cve-coordination@google.com",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.1,
        "impactScore": 4.7
      },
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.8
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
          "baseScore": 5.5,
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "SINGLE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "PARTIAL"
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.0,
        "impactScore": 4.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "cve-coordination@google.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-823"
        }
      ]
    },
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:google:asylo:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "0.6.0",
              "matchCriteriaId": "2E43ACF0-4DFF-4A7A-BC8B-90E067F13206"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/google/asylo/commit/e582f36ac49ee11a21d23ad6a30c333092e0a94e",
      "source": "cve-coordination@google.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/google/asylo/commit/e582f36ac49ee11a21d23ad6a30c333092e0a94e",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ]
    }
  ]
}