No, I am not making any claims about taint mode mitigating the bash bug.

My point is that the bash bug is, at its core, about treating untrusted data as executable code. Perl's taint mode is designed to catch that problem in Perl code.

Say you get an argument from the command line in your Perl program. That variable is now tainted, because it came from an untrusted source. Now, say you try to execute a command with system using that variable. Perl's taint mode will disallow it because the data fed to system is untrustworthy.

xoxo,
Andy

In reply to Re^3: The importance of avoiding the shell by petdance
in thread The importance of avoiding the shell by jhourcle

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.