SAP NetWeaver Application Server for ABAP (Kernel) and ABAP Platform (Kernel) - versions KERNEL 7.22, 8.04, 7.49, 7.53, 7.77, 7.81, 7.85, 7.86, 7.87, KRNL64UC 8.04, 7.22, 7.22EXT, 7.49, 7.53, KRNL64NUC 7.22, 7.22EXT, 7.49, does not sufficiently validate sap-passport information, which could lead to a Denial-of-Service attack. This allows an unauthorized remote user to provoke a breakdown of the SAP Web Dispatcher or Kernel work process. The crashed process can be restarted immediately, other processes are not affected.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Netweaver_abap | Sap | 7.22 (including) | 7.22 (including) |
| Netweaver_abap | Sap | 7.22ext (including) | 7.22ext (including) |
| Netweaver_abap | Sap | 7.49 (including) | 7.49 (including) |
| Netweaver_abap | Sap | 7.53 (including) | 7.53 (including) |
| Netweaver_abap | Sap | 7.77 (including) | 7.77 (including) |
| Netweaver_abap | Sap | 7.81 (including) | 7.81 (including) |
| Netweaver_abap | Sap | 7.85 (including) | 7.85 (including) |
| Netweaver_abap | Sap | 7.86 (including) | 7.86 (including) |
| Netweaver_abap | Sap | 7.87 (including) | 7.87 (including) |
| Netweaver_abap | Sap | 8.04 (including) | 8.04 (including) |
| Netweaver_abap | Sap | krnl64nuc_7.22 (including) | krnl64nuc_7.22 (including) |
| Netweaver_abap | Sap | krnl64nuc_8.04 (including) | krnl64nuc_8.04 (including) |
| Netweaver_as_abap | Sap | 7.22 (including) | 7.22 (including) |
| Netweaver_as_abap | Sap | 7.22ext (including) | 7.22ext (including) |
| Netweaver_as_abap | Sap | 7.49 (including) | 7.49 (including) |
| Netweaver_as_abap | Sap | 7.53 (including) | 7.53 (including) |
| Netweaver_as_abap | Sap | 7.77 (including) | 7.77 (including) |
| Netweaver_as_abap | Sap | 7.81 (including) | 7.81 (including) |
| Netweaver_as_abap | Sap | 7.85 (including) | 7.85 (including) |
| Netweaver_as_abap | Sap | 7.86 (including) | 7.86 (including) |
| Netweaver_as_abap | Sap | 7.87 (including) | 7.87 (including) |
| Netweaver_as_abap | Sap | 8.04 (including) | 8.04 (including) |
| Netweaver_as_abap | Sap | krnl64nuc_7.22 (including) | krnl64nuc_7.22 (including) |
| Netweaver_as_abap | Sap | krnl64nuc_8.04 (including) | krnl64nuc_8.04 (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.