Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying restore privileges when restoring a file. The restore capability of Nextcloud/ownCloud was not verifying whether a user has only read-only access to a share. Thus a user with read-only access was able to restore old versions.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Nextcloud_server | Nextcloud | * | 9.0.52 (excluding) |
Owncloud | Owncloud | * | 9.0.4 (excluding) |
Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: