cnvd - cnvd-2021-39033

cnvd-2021-39033

Vulnerability from cnvd

Title: Nextcloud存在未明漏洞（CNVD-2021-39033）

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，该漏洞源于当共享用户打开共享面板并试图删除此意外共享的“Create”特权时，Nextcloud服务器将静默地授予该共享读取特权，攻击者可利用该漏洞将Files Drop链接转换为联邦共享。

Severity: 中

Patch Name: Nextcloud存在未明漏洞（CNVD-2021-39033）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，该漏洞源于当共享用户打开共享面板并试图删除此意外共享的“Create”特权时，Nextcloud服务器将静默地授予该共享读取特权，攻击者可利用该漏洞将Files Drop链接转换为联邦共享。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-grph-cm44-p3jv

Reference: https://hackerone.com/reports/1167929

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-2021-32655"
    }
  },
  "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\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53\u5171\u4eab\u7528\u6237\u6253\u5f00\u5171\u4eab\u9762\u677f\u5e76\u8bd5\u56fe\u5220\u9664\u6b64\u610f\u5916\u5171\u4eab\u7684\u201cCreate\u201d\u7279\u6743\u65f6\uff0cNextcloud\u670d\u52a1\u5668\u5c06\u9759\u9ed8\u5730\u6388\u4e88\u8be5\u5171\u4eab\u8bfb\u53d6\u7279\u6743\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06Files Drop\u94fe\u63a5\u8f6c\u6362\u4e3a\u8054\u90a6\u5171\u4eab\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-grph-cm44-p3jv",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-39033",
  "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\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5f53\u5171\u4eab\u7528\u6237\u6253\u5f00\u5171\u4eab\u9762\u677f\u5e76\u8bd5\u56fe\u5220\u9664\u6b64\u610f\u5916\u5171\u4eab\u7684\u201cCreate\u201d\u7279\u6743\u65f6\uff0cNextcloud\u670d\u52a1\u5668\u5c06\u9759\u9ed8\u5730\u6388\u4e88\u8be5\u5171\u4eab\u8bfb\u53d6\u7279\u6743\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06Files Drop\u94fe\u63a5\u8f6c\u6362\u4e3a\u8054\u90a6\u5171\u4eab\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-2021-39033\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/1167929",
  "serverity": "\u4e2d",
  "submitTime": "2021-06-03",
  "title": "Nextcloud\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-39033\uff09"
}

CVE-2021-32655 (GCVE-0-2021-32655)

Vulnerability from cvelistv5

Published

2021-06-01 20:55

Modified

2024-08-03 23:25

Severity ?

3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

CWE

CWE-241 - Improper Handling of Unexpected Data Type

Summary

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share. This causes an issue on the UI side of the sharing user. When the sharing user opens the sharing panel and tries to remove the "Create" privileges of this unexpected share, Nextcloud server would silently grant the share read privileges. The vulnerability is patched in versions 19.0.11, 20.0.10 and 21.0.2. No workarounds are known to exist.

References

▼	URL	Tags
	https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jv	x_refsource_CONFIRM
	https://hackerone.com/reports/1167929	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://hackerone.com/reports/1167929"
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            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
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            ],
            "url": "https://security.gentoo.org/glsa/202208-17"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
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          "lang": "en",
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      "metrics": [
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            "userInteraction": "REQUIRED",
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            "version": "3.1"
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      ],
      "problemTypes": [
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            }
          ]
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      ],
      "providerMetadata": {
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      "references": [
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      ],
      "source": {
        "advisory": "GHSA-grph-cm44-p3jv",
        "discovery": "UNKNOWN"
      },
      "title": "Files Drop public link can be added as federated share",
      "x_legacyV4Record": {
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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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