Nextcloud is an open source home cloud server. When Memcached is used as memcache.distributed the rate limiting in Nextcloud Server could be reset unexpectedly resetting the rate count earlier than intended. Users are advised to upgrade to versions 25.0.11, 26.0.6 or 27.1.0. Users unable to upgrade should change their config setting memcache.distributed to OCMemcacheRedis and install Redis instead of Memcached.
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Nextcloud_server | Nextcloud | 22.0.0 (including) | 22.2.10.16 (excluding) |
| Nextcloud_server | Nextcloud | 23.0.0 (including) | 23.0.12.11 (excluding) |
| Nextcloud_server | Nextcloud | 24.0.0 (including) | 24.0.12.7 (excluding) |
| Nextcloud_server | Nextcloud | 25.0.0 (including) | 25.0.11 (excluding) |
| Nextcloud_server | Nextcloud | 26.0.0 (including) | 26.0.6 (excluding) |
| Nextcloud_server | Nextcloud | 27.0.0 (including) | 27.0.0 (including) |
Common protection mechanisms include:
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator. [REF-45]