Vulnerability-Lookup

CNVD-2021-16924

Vulnerability from cnvd - Published: 2021-03-11

Title

Nextcloud访问控制错误漏洞

Description

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud 20.0.6之前版本存在安全漏洞，该漏洞源于丢失的用户检查不经意地为其他用户的外部存储配置填充了用户自己的凭证。目前没有详细的漏洞细节提供。

Severity

中

Patch Name

Nextcloud访问控制错误漏洞的补丁

Patch Description

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud 20.0.6之前版本存在安全漏洞，该漏洞源于丢失的用户检查不经意地为其他用户的外部存储配置填充了用户自己的凭证。目前没有详细的漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

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://nextcloud.com/security/advisory/?id=NC-SA-2021-004

Reference

https://github.com/nextcloud/server/pull/25224

Impacted products

Name
Nextcloud Nextcloud <20.0.6

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-22877",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-22877"
    }
  },
  "description": "Nextcloud\u662f\u5fb7\u56fdNextcloud\u516c\u53f8\u7684\u4e00\u5957\u5f00\u6e90\u7684\u81ea\u6258\u7ba1\u6587\u4ef6\u540c\u6b65\u548c\u5171\u4eab\u7684\u901a\u4fe1\u5e94\u7528\u5e73\u53f0\u3002\n\nNextcloud 20.0.6\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4e22\u5931\u7684\u7528\u6237\u68c0\u67e5\u4e0d\u7ecf\u610f\u5730\u4e3a\u5176\u4ed6\u7528\u6237\u7684\u5916\u90e8\u5b58\u50a8\u914d\u7f6e\u586b\u5145\u4e86\u7528\u6237\u81ea\u5df1\u7684\u51ed\u8bc1\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\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://nextcloud.com/security/advisory/?id=NC-SA-2021-004",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-16924",
  "openTime": "2021-03-11",
  "patchDescription": "Nextcloud\u662f\u5fb7\u56fdNextcloud\u516c\u53f8\u7684\u4e00\u5957\u5f00\u6e90\u7684\u81ea\u6258\u7ba1\u6587\u4ef6\u540c\u6b65\u548c\u5171\u4eab\u7684\u901a\u4fe1\u5e94\u7528\u5e73\u53f0\u3002\r\n\r\nNextcloud 20.0.6\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4e22\u5931\u7684\u7528\u6237\u68c0\u67e5\u4e0d\u7ecf\u610f\u5730\u4e3a\u5176\u4ed6\u7528\u6237\u7684\u5916\u90e8\u5b58\u50a8\u914d\u7f6e\u586b\u5145\u4e86\u7528\u6237\u81ea\u5df1\u7684\u51ed\u8bc1\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\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": "Nextcloud\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Nextcloud Nextcloud \u003c20.0.6"
  },
  "referenceLink": "https://github.com/nextcloud/server/pull/25224",
  "serverity": "\u4e2d",
  "submitTime": "2021-03-10",
  "title": "Nextcloud\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2021-22877 (GCVE-0-2021-22877)

Vulnerability from cvelistv5 – Published: 2021-03-03 17:39 – Updated: 2024-08-03 18:51

Summary

A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.

Severity

No CVSS data available.

CWE

CWE-284 - Improper Access Control - Generic (CWE-284)

Assigner

hackerone mitre root

References

5 references

URL	Tags
https://hackerone.com/reports/1061591	x_refsource_MISC
https://nextcloud.com/security/advisory/?id=NC-SA…	x_refsource_MISC
https://github.com/nextcloud/server/issues/24600	x_refsource_MISC
https://github.com/nextcloud/server/pull/25224	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA

Impacted products

1 product

Vendor	Product	Version
n/a	Nextcloud Server	Affected: Fixed in 20.0.6

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:51:07.530Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "tags": [
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              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/1061591"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2021-004"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nextcloud/server/issues/24600"
          },
          {
            "tags": [
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            ],
            "url": "https://github.com/nextcloud/server/pull/25224"
          },
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            "name": "FEDORA-2021-eac0e52f88",
            "tags": [
              "vendor-advisory",
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            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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        {
          "product": "Nextcloud Server",
          "vendor": "n/a",
          "versions": [
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              "status": "affected",
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          "lang": "en",
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        }
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            }
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      "providerMetadata": {
        "dateUpdated": "2021-07-09T08:08:32.000Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
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          ],
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        },
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          ],
          "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2021-004"
        },
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          ],
          "url": "https://github.com/nextcloud/server/issues/24600"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/server/pull/25224"
        },
        {
          "name": "FEDORA-2021-eac0e52f88",
          "tags": [
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            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/"
        }
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            },
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            }
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    "assignerShortName": "hackerone",
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    "datePublished": "2021-03-03T17:39:15.000Z",
    "dateReserved": "2021-01-06T00:00:00.000Z",
    "dateUpdated": "2024-08-03T18:51:07.530Z",
    "state": "PUBLISHED"
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}

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.

Detection rules are retrieved from Rulezet.

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.