9                   Buffer Sizes

Buffer overflow errors are a particularly dangerous type of bug in C programs.  They are directly responsible for about half of all security attacks [Larochelle01].  For performance reasons, C does not perform run time bounds checking.  Referencing storage outside allocated regions can cause memory corruption and lead to strange behavior.  Moreover, buffer overflow bugs are particularly insidious because they can go undetected in testing or normal use, but usually result in security critical bugs.  Reads beyond the end of a buffer can cause the program to leak information.  Writes beyond the end a buffer (buffer overflows) can usually be exploited make the program run arbitrary code.  Attackers can exploit these programming bugs to replacede.  Attackers can exploit these programming bugs to replacede.  Attackers can exploit these programming bugs to replacede.  Attackers can exploit these programming bugs to replacede.  Attackers can exploit these programming bugs to replacede.  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