Dynamic stacking memory management method for preventing buffering area from overflow attacking

Abstract

Since relative position between return address and local variable is changed in dynamic random, return address is not possible to be rewritten so as to prevent attacking computer by using buffer flood. The invention includes following claim of rights: method of dynamic stack memory management including object program, compiler, memory device and computer system, which possesses characters of the method.

Description

1. Technical field [0001] The invention relates to a dynamic stack memory management method, and preventing buffer overflow is a common method for attacking computer systems. The invention proposes a dynamic stack memory management method, which can effectively prevent buffer overflow attacks. 2. Technical background [0002] A buffer is a place where data is stored in computer memory when a program is running. When a program tries to write a piece of data into a certain memory buffer, if the length of the data exceeds the length of the buffer, a buffer overflow occurs. Assailants can exploit this weakness to attack computers (see [1] E. Spafford. The Internet Worm Program: Analysis. Computer Communication Review, January 1989). The attacker writes a string that exceeds the length of the buffer into the buffer. Because the super-long character string written covers the adjacent storage unit, it often leads to two kinds of results. One is to cause the program to fail to r...

AI Technical Summary

Problems solved by technology

If when the function returns, it is found that the value of the canary has been changed, it proves that someone may be trying to perform a buffer overflow attack

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