I'm not sure why you are asserting that all parameters must specifically be untainted. I would tend to agree with Juerd that unless you're using it in a system call, it doesn't pose a security problem. (theguvnor would welcome any enlightenment to the contrary).

On the other hand, I don't understand Juerd's assertion that Perl's tainting is such a problem.

  1. You don't have to run -T if you don't want.
  2. Even when you use it, you only have to untaint those variables that you want to use in system calls.

So I don't know why Juerd is so down on Perl's tainting mechanism...

..Guv

In reply to Re: Why use taint by theguvnor
in thread Errors in my (simple?) CGI Script! by munchie

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.