XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Its possible to make XWiki create many new schemas and fill them with tables just by using a crafted user identifier in the login form. This may lead to degraded database performance. The problem has been patched in XWiki 13.10.8, 14.6RC1 and 14.4.2. Users are advised to upgrade. There are no known workarounds for this issue.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Xwiki | Xwiki | * | 13.10.8 (excluding) |
| Xwiki | Xwiki | 14.0.0 (including) | 14.4.2 (excluding) |
| Xwiki | Xwiki | 14.5.0 (including) | 14.6 (excluding) |
| Xwiki | Xwiki | 14.4.3 (including) | 14.4.3 (including) |
| Xwiki | Xwiki | 14.4.4 (including) | 14.4.4 (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.