An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Owncloud | Owncloud | * | 10.13.1 (excluding) |
| Owncloud | Ubuntu | bionic | * |
| Owncloud | Ubuntu | trusty | * |
| Owncloud | Ubuntu | xenial | * |