Taint mode does not trap tainted data being included as part of the format string passed to (s)printf -- i.e. the following does not die with a taint error
And it shouldn't. Tainting prevents you from using tainted data to (potentially) modify the environment. You can't open a file for writing if the filename is tainted. But you can print tainted data. Or open a file whose name is tainted. Tainting will not prevent your program from consuming huge quantities of memory or CPU time - or from printing out very long strings.
Perl --((8:>*

In reply to Re^2: Format string vulnerability by Perl Mouse
in thread Format string vulnerability by Mr_Person

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