CVE-2021-41177
Rate-limits not working on instances without configured memory cache backend
- State
- Published
- Severity
- 8.1 High
- Published
- Oct 25, 2021
- Updated
- Aug 4, 2024
- Reserved
- Sep 15, 2021
Description
Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, Nextcloud Server did not implement a database backend for rate-limiting purposes. Any component of Nextcloud using rate-limits (as as `AnonRateThrottle` or `UserRateThrottle`) was thus not rate limited on instances not having a memory cache backend configured. In the case of a default installation, this would notably include the rate-limits on the two factor codes. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5, or 22.2.0. As a workaround, enable a memory cache backend in `config.php`.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H | GitHub_M |
Weaknesses
- CWE-799 Improper Control of Interaction Frequency
Affected Products
| Product | Versions |
|---|---|
security-advisoriesnextcloud |
|
References
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