Just to expand on TMH's post. For instance passing a string containing ";" to a shell is a bad idea, but taking that same string and pushing it to a file that is used as a faq is not. tainted means different things to different outputs, imagine someone being able to push cascade deletes in a sql statment or ":" to data that is to be written in a /etc/passwd file. Perl's view of tainted data is anything that comes from the end user that is not checked to verify the string. Real Life tainted data is data that is not checked to verify "good" behavior in is destination.

-Waswas

In reply to Re: Re: Tainted or bad characters by waswas-fng
in thread Tainted or bad characters by bradcathey

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.