CVE-2021-32688

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.

Link	Resource
https://hackerone.com/reports/1193321	Permissions Required
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r	Third Party Advisory
https://github.com/nextcloud/server/pull/27000	Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202208-17	Third Party Advisory

Configuration 1

cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

---

Published : 2021-07-12 02:15

Updated : 2022-10-26 02:10

---

NVD link : CVE-2021-32688

Mitre link : CVE-2021-32688

No products.

CWE-285