Since Lincoln Stein has added these global variables in CGI.pm, he's clearly aware of DOS problems. He has these fairly well documented in his POD, so I also wonder why they're not set. My guess is that he realizes that there is a hole here but he's trying to maintain backwards compatibility.

I understand that one or both of these variables have been removed in CGI.pm versions 3+, so I'm curious how this situation has been addressed. tachyon raised this issue in this post about a security problem with 3.01. Since these globals don't appear to be present, it seems that this code wouldn't work for the newer versions.

Cheers,
Ovid

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