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 3.11% · 87.1th 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
3.11%
87.1th 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 |
Exploit Intelligence
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r (circl)
- https://github.com/nextcloud/server/pull/27000 (circl)
- https://hackerone.com/reports/1193321 (circl)
- FEDORA-2021-9b421b78af (circl)
- FEDORA-2021-6f327296fe (circl)
- GLSA-202208-17 (circl)
- Scoped apptokens can be changed by that very apptoken (hackerone)
- Scoped apptokens can be changed by that very apptoken (hackerone)
- Scoped apptokens can be changed by that very apptoken (hackerone)
Timeline
- CVE Published
- Jul 13, 2021 EPSS Score
- Jul 15, 2021 PoC Published
- Nov 9, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 7, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
- Jan 2, 2023 EPSS Score
- Mar 3, 2023 EPSS Score
- May 2, 2023 EPSS Score
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r url
- https://github.com/nextcloud/server/pull/27000 url
- https://hackerone.com/reports/1193321 url
- FEDORA-2021-9b421b78af vendor-advisory
- FEDORA-2021-6f327296fe vendor-advisory
- GLSA-202208-17 vendor-advisory