cnvd - cnvd-2021-51815

cnvd-2021-51815

Vulnerability from cnvd

Title: Nextcloud存在未明漏洞（CNVD-2021-51815）

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Nextcloud Server缺乏权限检查，令牌能够在19.0.13、20.0.11和21.0.3之前的版本中更改它们自己的权限。攻击者可利用该漏洞导致文件系统限制令牌能够授予自己对文件系统的访问权。

Severity: 高

Patch Name: Nextcloud存在未明漏洞（CNVD-2021-51815）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Nextcloud Server缺乏权限检查，令牌能够在19.0.13、20.0.11和21.0.3之前的版本中更改它们自己的权限。攻击者可利用该漏洞导致文件系统限制令牌能够授予自己对文件系统的访问权。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://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r

Reference: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r

Impacted products

Name
['Nextcloud Nextcloud Server 19.0.13', 'Nextcloud Nextcloud Server 20.0.11', 'Nextcloud Nextcloud Server <21.0.3']

Show details on source website

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-32688",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-32688"
    }
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}

CVE-2021-32688 (GCVE-0-2021-32688)

Vulnerability from cvelistv5

Published

2021-07-12 13:45

Modified

2024-08-03 23:25

Severity ?

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

CWE

CWE-285 - Improper Authorization

Summary

Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server supports application specific tokens for authentication purposes. These tokens are supposed to be granted to a specific applications (e.g. DAV sync clients), and can also be configured by the user to not have any filesystem access. Due to a lacking permission check, the tokens were able to change their own permissions in versions prior to 19.0.13, 20.0.11, and 21.0.3. Thus fileystem limited tokens were able to grant themselves access to the filesystem. The issue is patched in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds aside from upgrading.

References

▼	URL	Tags
	https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r	x_refsource_CONFIRM
	https://github.com/nextcloud/server/pull/27000	x_refsource_MISC
	https://hackerone.com/reports/1193321	x_refsource_MISC
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/	vendor-advisory, x_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/	vendor-advisory, x_refsource_FEDORA
	https://security.gentoo.org/glsa/202208-17	vendor-advisory, x_refsource_GENTOO

Impacted products

	Vendor	Product	Version
	nextcloud	security-advisories	Version: < 19.0.13 Version: >= 20.0.0, < 20.0.11 Version: >= 21.0.0, < 21.0.3

Show details on NVD website

JSON

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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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