The Query Compiler, Rewrite, Optimizer component in IBM DB2 UDB 9.5 before FP6a allows remote authenticated users to cause a denial of service (CPU consumption) via a crafted query involving certain UNION ALL views, leading to an indefinitely large amount of compilation time.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Db2 | Ibm | 9.5 (including) | 9.5 (including) |
| Db2 | Ibm | 9.5-fp1 (including) | 9.5-fp1 (including) |
| Db2 | Ibm | 9.5-fp2 (including) | 9.5-fp2 (including) |
| Db2 | Ibm | 9.5-fp2a (including) | 9.5-fp2a (including) |
| Db2 | Ibm | 9.5-fp3 (including) | 9.5-fp3 (including) |
| Db2 | Ibm | 9.5-fp3a (including) | 9.5-fp3a (including) |
| Db2 | Ibm | 9.5-fp3b (including) | 9.5-fp3b (including) |
| Db2 | Ibm | 9.5-fp4 (including) | 9.5-fp4 (including) |
| Db2 | Ibm | 9.5-fp4a (including) | 9.5-fp4a (including) |
| Db2 | Ibm | 9.5-fp5 (including) | 9.5-fp5 (including) |