{
  "id": "CVE-2020-8290",
  "sourceIdentifier": "support@hackerone.com",
  "published": "2020-12-27T02:15:14.573",
  "lastModified": "2024-11-21T05:38:40.217",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in `bztransmit` helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary."
    },
    {
      "lang": "es",
      "value": "Backblaze para Windows y Backblaze para macOS versiones anteriores a 7.0.0.439, sufren de una administraci\u00f3n de privilegios inadecuada en el asistente \"bztransmit\" debido a la falta de manejo y comprobaci\u00f3n de permisos antes de la creaci\u00f3n de directorios de actualizaci\u00f3n de clientes que permiten la escalada local de privilegios por medio del binario de actualizaci\u00f3n de cliente no autorizado"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
          "baseScore": 4.6,
          "accessVector": "LOCAL",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "PARTIAL"
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 3.9,
        "impactScore": 6.4,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "support@hackerone.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ]
    },
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:macos:*:*",
              "versionEndExcluding": "7.0.0.439",
              "matchCriteriaId": "BA80ABAD-2620-4350-B506-ACCF9B4A18E3"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:windows:*:*",
              "versionEndExcluding": "7.0.0.439",
              "matchCriteriaId": "F7051153-3CAD-442F-BD4B-8C780431FBD4"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/geffner/CVE-2020-8290/blob/master/README.md",
      "source": "support@hackerone.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://hackerone.com/reports/818857",
      "source": "support@hackerone.com",
      "tags": [
        "Permissions Required"
      ]
    },
    {
      "url": "https://youtu.be/OpC6neWd2aM",
      "source": "support@hackerone.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/geffner/CVE-2020-8290/blob/master/README.md",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://hackerone.com/reports/818857",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Permissions Required"
      ]
    },
    {
      "url": "https://youtu.be/OpC6neWd2aM",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    }
  ]
}