IBM DB2 9.7 through FP10, 9.8 through FP5, 10.1 through FP4, and 10.5 before FP5 on Linux, UNIX, and Windows allows remote authenticated users to cause a denial of service (daemon crash) by specifying the same column within multiple ALTER TABLE statements.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.