Thank you for sharing that link. The parallel between that article and LanX's suggestion is interesting. From my perspective, the Good Security™ solution is for Perl to balk if any of the %ENV is still tainted prior to shelling out; right now, it only holds for qw|PATH IFS CDPATH ENV BASH_ENV|. It's problematic that a module could expose you in this type of vector. It feels like it breaks the principle of least surprise. Unfortunately, that would break too many scripts and thus would never fly.

My proposed solution (explicitly setting an exclusive list of expected parameters) would seem to resolve this this issue for my own external calls, but I wanted to get a sense of the relative value of those values I was defaultly relegating to the trash heap. Frankly, I'm still confused at the reluctance to just toss the hash content; of course, that's why I posed the OP.

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

In reply to Re^8: Taint and Shellshock by kennethk
in thread Taint and Shellshock by kennethk

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