VDB
CVE-2021-32688
CVE-2021-32688
PUBLISHED
CVSS 8.800000190734863 HIGH
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.
EPSS 2.31% · 82.2th percentile
Risk Scores
CVSS 3.1
8.800000190734863
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
2.31%
82.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| fedoraproject | fedora | 33, 34 |
| nextcloud | security-advisories | *, >= 20.0.0, < 20.0.11, * |
| nextcloud | nextcloud_server | 20.0.0, 21.0.0, 0 |
Timeline
- CVE Published
- Jul 13, 2021 EPSS Score
- Jul 15, 2021 PoC Published
- Nov 10, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 8, 2022 EPSS Score
- Sep 6, 2022 EPSS Score
- Jan 3, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- May 3, 2023 EPSS Score
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r advisory
- https://github.com/nextcloud/server/pull/27000 patch
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/ technical
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/ technical
- https://security.gentoo.org/glsa/202208-17 advisory
- https://hackerone.com/reports/1193321 technical