Research of Anti-buffer Overflow Based on Libsafe

Buffer overflow is a kind phenomenon that we offen meet in many computer operating system.In this paper reason and anti-measures of buffer overflow were introduced firstly.and than, discuss how to prevent system from buffer overflow by Libsafe format string and stack overflow.compared other anti-buffer overflow this way look more easy to implement and configure. only configure the LD_PRELOAD environment variable the operating system can recall and keep away some buffer overflow unknowed in advance without recompiled the application program.