NICM.SYS driver 3.0.0.4, as used in Novell NetWare Client 4.91 SP4, allows local users to execute arbitrary code by opening the \\.\nicm device and providing crafted kernel addresses via IOCTLs with the METHOD_NEITHER buffering mode.
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.