cnvd - cnvd-2021-39030

cnvd-2021-39030

Vulnerability from cnvd

Title: Nextcloud存在未明漏洞（CNVD-2021-39030）

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 Server存在安全漏洞，攻击者可利用该漏洞通过访问合法服务器用户添加为联邦共享的公共链接来访问服务器用户的基本信息。

Severity: 高

Patch Name: Nextcloud存在未明漏洞（CNVD-2021-39030）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 Server存在安全漏洞，攻击者可利用该漏洞通过访问合法服务器用户添加为联邦共享的公共链接来访问服务器用户的基本信息。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:

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j875-vr2q-h6x6

Reference: https://hackerone.com/reports/1167853

Impacted products

Name
['Nextcloud Nextcloud Server 19.0.11', 'Nextcloud Nextcloud Server 20.0.10', 'Nextcloud Nextcloud Server <21.0.2']

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-32656"
    }
  },
  "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 Server\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u8bbf\u95ee\u5408\u6cd5\u670d\u52a1\u5668\u7528\u6237\u6dfb\u52a0\u4e3a\u8054\u90a6\u5171\u4eab\u7684\u516c\u5171\u94fe\u63a5\u6765\u8bbf\u95ee\u670d\u52a1\u5668\u7528\u6237\u7684\u57fa\u672c\u4fe1\u606f\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-j875-vr2q-h6x6",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-39030",
  "openTime": "2021-06-03",
  "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 Server\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u8bbf\u95ee\u5408\u6cd5\u670d\u52a1\u5668\u7528\u6237\u6dfb\u52a0\u4e3a\u8054\u90a6\u5171\u4eab\u7684\u516c\u5171\u94fe\u63a5\u6765\u8bbf\u95ee\u670d\u52a1\u5668\u7528\u6237\u7684\u57fa\u672c\u4fe1\u606f\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\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-39030\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Nextcloud Nextcloud Server 19.0.11",
      "Nextcloud Nextcloud Server 20.0.10",
      "Nextcloud Nextcloud Server \u003c21.0.2"
    ]
  },
  "referenceLink": "https://hackerone.com/reports/1167853",
  "serverity": "\u9ad8",
  "submitTime": "2021-06-03",
  "title": "Nextcloud\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-39030\uff09"
}

CVE-2021-32656 (GCVE-0-2021-32656)

Vulnerability from cvelistv5

Published

2021-06-01 21:45

Modified

2024-08-03 23:25

Severity ?

8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

CWE

CWE-284 - Improper Access Control

Summary

Nextcloud Server is a Nextcloud package that handles data storage. A vulnerability in federated share exists in versions prior to 19.0.11, 20.0.10, and 21.0.2. An attacker can gain access to basic information about users of a server by accessing a public link that a legitimate server user added as a federated share. This happens because Nextcloud supports sharing registered users with other Nextcloud servers, which can be done automatically when selecting the "Add server automatically once a federated share was created successfully" setting. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2 As a workaround, disable "Add server automatically once a federated share was created successfully" in the Nextcloud settings.

References

▼	URL	Tags
	https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j875-vr2q-h6x6	x_refsource_CONFIRM
	https://hackerone.com/reports/1167853	x_refsource_MISC
	https://security.gentoo.org/glsa/202208-17	vendor-advisory, x_refsource_GENTOO

Impacted products

	Vendor	Product	Version
	nextcloud	security-advisories	Version: < 19.0.11 Version: >= 20.0.0, < 20.0.10 Version: >= 21.0.0, < 21.0.2

Show details on NVD website

JSON

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            "url": "https://security.gentoo.org/glsa/202208-17"
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        ],
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    ],
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          "vendor": "nextcloud",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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