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 mitre root Scorecard

References

3 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

1 product

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",
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            "tags": [
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              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/818857"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "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": [
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-269",
              "description": "Improper Privilege Management (CWE-269)",
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            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2020-12-27T01:22:39.000Z",
        "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"
        },
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          "vendor": {
            "vendor_data": [
              {
                "product": {
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                    {
                      "product_name": "Backblaze",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Prior to 7.0.0.439"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
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        "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": {
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              "description": [
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                  "value": "Improper Privilege Management (CWE-269)"
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            },
            {
              "name": "https://youtu.be/OpC6neWd2aM",
              "refsource": "MISC",
              "url": "https://youtu.be/OpC6neWd2aM"
            },
            {
              "name": "https://github.com/geffner/CVE-2020-8290/blob/master/README.md",
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              "url": "https://github.com/geffner/CVE-2020-8290/blob/master/README.md"
            }
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2020-8290",
    "datePublished": "2020-12-27T01:22:39.000Z",
    "dateReserved": "2020-01-28T00:00:00.000Z",
    "dateUpdated": "2024-08-04T09:56:28.299Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CNVD-2021-07239

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

Tags

Sightings

Nomenclature

Related by attack behaviour