notation is a CLI tool to sign and verify OCI artifacts and container images. An attacker who has compromised a registry and added a high number of signatures to an artifact can cause denial of service of services on the machine, if a user runs notation verify command on the same machine. The problem has been fixed in the release v1.0.0-rc.6. Users should upgrade their notation packages to v1.0.0-rc.6 or above. Users unable to upgrade may restrict container registries to a set of secure and trusted container registries.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Notation-go | Notaryproject | * | 1.0.0 (excluding) |
| Notation-go | Notaryproject | 1.0.0-rc1 (including) | 1.0.0-rc1 (including) |
| Notation-go | Notaryproject | 1.0.0-rc2 (including) | 1.0.0-rc2 (including) |
| Notation-go | Notaryproject | 1.0.0-rc3 (including) | 1.0.0-rc3 (including) |
| Notation-go | Notaryproject | 1.0.0-rc4 (including) | 1.0.0-rc4 (including) |
| Notation-go | Notaryproject | 1.0.0-rc5 (including) | 1.0.0-rc5 (including) |
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.