Vulnerability-Lookup

CNVD-2021-07239

Vulnerability from cnvd - Published: 2021-01-28

Title

Backblaze权限许可和访问控制问题漏洞

Description

Backblaze是美国Backblaze公司的一款云端备份服务。 Backblaze for Windows和Backblaze for macOS 7.0.0.439之前版本存在权限许可和访问控制问题漏洞，该漏洞源于在创建客户端更新目录之前缺乏权限处理和验证，允许通过恶意客户端更新二进制文件本地升级权限。目前没有详细漏洞细节提供。

Severity

中

Patch Name

Backblaze权限许可和访问控制问题漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接：https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-8290

Impacted products

Name
['Backblaze Backblaze for Windows <7.0.0.439', 'Backblaze Backblaze for macOS <7.0.0.439']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-8290",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-8290"
    }
  },
  "description": "Backblaze\u662f\u7f8e\u56fdBackblaze\u516c\u53f8\u7684\u4e00\u6b3e\u4e91\u7aef\u5907\u4efd\u670d\u52a1\u3002\n\nBackblaze for Windows\u548cBackblaze for macOS 7.0.0.439\u4e4b\u524d\u7248\u672c\u5b58\u5728\u6743\u9650\u8bb8\u53ef\u548c\u8bbf\u95ee\u63a7\u5236\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u521b\u5efa\u5ba2\u6237\u7aef\u66f4\u65b0\u76ee\u5f55\u4e4b\u524d\u7f3a\u4e4f\u6743\u9650\u5904\u7406\u548c\u9a8c\u8bc1\uff0c\u5141\u8bb8\u901a\u8fc7\u6076\u610f\u5ba2\u6237\u7aef\u66f4\u65b0\u4e8c\u8fdb\u5236\u6587\u4ef6\u672c\u5730\u5347\u7ea7\u6743\u9650\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1ahttps://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-07239",
  "openTime": "2021-01-28",
  "patchDescription": "Backblaze\u662f\u7f8e\u56fdBackblaze\u516c\u53f8\u7684\u4e00\u6b3e\u4e91\u7aef\u5907\u4efd\u670d\u52a1\u3002\r\n\r\nBackblaze for Windows\u548cBackblaze for macOS 7.0.0.439\u4e4b\u524d\u7248\u672c\u5b58\u5728\u6743\u9650\u8bb8\u53ef\u548c\u8bbf\u95ee\u63a7\u5236\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u521b\u5efa\u5ba2\u6237\u7aef\u66f4\u65b0\u76ee\u5f55\u4e4b\u524d\u7f3a\u4e4f\u6743\u9650\u5904\u7406\u548c\u9a8c\u8bc1\uff0c\u5141\u8bb8\u901a\u8fc7\u6076\u610f\u5ba2\u6237\u7aef\u66f4\u65b0\u4e8c\u8fdb\u5236\u6587\u4ef6\u672c\u5730\u5347\u7ea7\u6743\u9650\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Backblaze\u6743\u9650\u8bb8\u53ef\u548c\u8bbf\u95ee\u63a7\u5236\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Backblaze Backblaze for Windows \u003c7.0.0.439",
      "Backblaze Backblaze for macOS \u003c7.0.0.439"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-8290",
  "serverity": "\u4e2d",
  "submitTime": "2021-01-27",
  "title": "Backblaze\u6743\u9650\u8bb8\u53ef\u548c\u8bbf\u95ee\u63a7\u5236\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2020-8290 (GCVE-0-2020-8290)

Vulnerability from cvelistv5 – Published: 2020-12-27 01:22 – Updated: 2024-08-04 09:56

Summary

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.

Severity ?

No CVSS data available.

CWE

CWE-269 - Improper Privilege Management (CWE-269)

Assigner

hackerone

References

URL

Tags

	https://hackerone.com/reports/818857	x_refsource_MISC
	https://youtu.be/OpC6neWd2aM	x_refsource_MISC
	https://github.com/geffner/CVE-2020-8290/blob/mas…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	Backblaze	Affected: Prior to 7.0.0.439

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T09:56:28.299Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
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            "tags": [
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              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/818857"
          },
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://youtu.be/OpC6neWd2aM"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/geffner/CVE-2020-8290/blob/master/README.md"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Backblaze",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Prior to 7.0.0.439"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-269",
              "description": "Improper Privilege Management (CWE-269)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-12-27T01:22:39",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/818857"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://youtu.be/OpC6neWd2aM"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/geffner/CVE-2020-8290/blob/master/README.md"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "support@hackerone.com",
          "ID": "CVE-2020-8290",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Backblaze",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Prior to 7.0.0.439"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
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              "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."
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          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
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                  "value": "Improper Privilege Management (CWE-269)"
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        },
        "references": {
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              "refsource": "MISC",
              "url": "https://hackerone.com/reports/818857"
            },
            {
              "name": "https://youtu.be/OpC6neWd2aM",
              "refsource": "MISC",
              "url": "https://youtu.be/OpC6neWd2aM"
            },
            {
              "name": "https://github.com/geffner/CVE-2020-8290/blob/master/README.md",
              "refsource": "MISC",
              "url": "https://github.com/geffner/CVE-2020-8290/blob/master/README.md"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2020-8290",
    "datePublished": "2020-12-27T01:22:39",
    "dateReserved": "2020-01-28T00:00:00",
    "dateUpdated": "2024-08-04T09:56:28.299Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CNVD-2021-07239

CVE-2020-8290 (GCVE-0-2020-8290)

Tags

Sightings

Nomenclature