Buffer
Overflow Causes. ©2002, Jedidiah R. Crandall, Susan L. Gerhart, Jan G.
Hogle.
http://sfsecurity.pr.erau.edu
Old
code used for new purposes - Problem.
Often old code is reused in new projects. Even if the old code was thoroughly tested and written in a safe manner, it might not have accounted for things that the new code expects it to support, like international character sets.