As I recall, the original CGI::Vars function will separate values with an ASCII zero. By allowing ASCII zeroes into the data, you have two problems.

  1. Since we seperate data with an ASCII zero, what happens if we ever need to embed one? You'll not likely to run into one, but the one time you do...
  2. You run the risk of a security problem called "The Poison Null Byte". Go to this overview of CGI security and search for "Poison". That should take you right to a description of the problem.

Cheers,
Ovid

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In reply to (Ovid) Re(4): CGI OO 'param' vs. hash by Ovid
in thread CGI OO 'param' vs. hash by legLess

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