GSD-2020-8289

Vulnerability from gsd - Updated: 2023-12-13 01:21
Details
Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality.
Aliases
Aliases
CVE-2020-8289
To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-8289",
    "description": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality.",
    "id": "GSD-2020-8289"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-8289"
      ],
      "details": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality.",
      "id": "GSD-2020-8289",
      "modified": "2023-12-13T01:21:54.329187Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "support@hackerone.com",
        "ID": "CVE-2020-8289",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Backblaze",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
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          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "Improper Certificate Validation (CWE-295)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://hackerone.com/reports/818853",
            "refsource": "MISC",
            "url": "https://hackerone.com/reports/818853"
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          },
          {
            "name": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md",
            "refsource": "MISC",
            "url": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md"
          },
          {
            "name": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/",
            "refsource": "MISC",
            "url": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/"
          },
          {
            "name": "20201229 Re: [FD] CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze",
            "refsource": "FULLDISC",
            "url": "http://seclists.org/fulldisclosure/2020/Dec/57"
          },
          {
            "name": "20201229 Re: CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze",
            "refsource": "FULLDISC",
            "url": "http://seclists.org/fulldisclosure/2020/Dec/58"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:windows:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.0.1.433",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:macos:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.0.1.434",
                "vulnerable": true
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      "cve": {
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          "ID": "CVE-2020-8289"
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        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality."
            }
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                  "value": "CWE-295"
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md"
            },
            {
              "name": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/",
              "refsource": "MISC",
              "tags": [
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              ],
              "url": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/"
            },
            {
              "name": "https://youtu.be/W0THXbcX5V8",
              "refsource": "MISC",
              "tags": [
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              "url": "https://youtu.be/W0THXbcX5V8"
            },
            {
              "name": "https://hackerone.com/reports/818853",
              "refsource": "MISC",
              "tags": [
                "Permissions Required"
              ],
              "url": "https://hackerone.com/reports/818853"
            },
            {
              "name": "20201229 Re: CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze",
              "refsource": "FULLDISC",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://seclists.org/fulldisclosure/2020/Dec/58"
            },
            {
              "name": "20201229 Re: [FD] CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze",
              "refsource": "FULLDISC",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://seclists.org/fulldisclosure/2020/Dec/57"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 9.3,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2020-12-31T19:04Z",
      "publishedDate": "2020-12-27T02:15Z"
    }
  }
}



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