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Re: perl -s is evil?by blakem (Monsignor) |
on Nov 15, 2001 at 05:52 UTC ( [id://125485]=note: print w/replies, xml ) | Need Help?? |
Yes, -s is very bad, but I hadn't realized just how bad until you posted this.... Among the many globals that I could tweak with -s were $< $> $) and $( which should raise
a huge security flag for anyone whos read perlvar. For instance, when saved as evildashs.pl, and envoked as:
% ./evildashs.pl -\<=0 -\>=0 -\(=0 -\)=0 The following code might raise some eyebrows.... I don't think this actually gives the process any new powers, but it would allow someone to execute code that was only supposed to be invoked as root. Oh, right. I should include the obligatory link to Getopt::Std and Getopt::Long for a much better way to handle command line options. -Blake
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