This can be avoided using the Safe module. Build the compartment to evaluate the Perl-code configuration using 
$compartment = new Safe;
$compartment->permit_only(qw(:base_core :base_mem)); # very restrictiv
+e
$result = $compartment->reval($unsafe_code);

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and the evaluated code will not be able to do anything than build data structures. (See perldoc Opcode for a list of tags.)

Makeshifts last the longest.

In reply to Re: Potential security hazard, be careful by Aristotle
in thread How to remember who is logged in... by the_Don

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