MEMORY MANAGEMENT METHOD, MEMORY DEVICE, COMPUTER SYSTEM, COMPILER AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a memory management technique for avoiding stack smashing attack.;SOLUTION: When securing a local variable storing area LV for a stack of a subroutine, the size of the local variable storing area LV is determined randomly in a range larger than the required size for storing all local variables declared, in a source program of the subroutine. Thus, because it is impossible to precisely anticipate the relative position of a return address storing area RA, in a stack frame from the source code or the like, it becomes very difficult to rewrite the return address with a destination address (the start address of the malicious program code) by the stack-smashing attack.;COPYRIGHT: (C)2004,JPO