I guess that it really depends on what happens with these files AFTER they have been uploaded. It doesn't matter at all what is in the file that is being uploaded... It will never be executed in your code. Unless you are at some point exec()'ing the contents of the file (ps. NEVER NEVER NEVER exec use supplied data!) then the contents of the file will stay just as they are: the contents of the file.

If somehow the file was being placed into a portion of the web server that WAS accessible, and the file was executable, then you would have a different story on your hands, but you did say that it would be stored in a non-accessible directory as well.

Given what you've told us so far, you appear to be safe as written.

In reply to Re: File Upload Script: Security Issue??? by hubb0r
in thread File Upload Script: Security Issue??? by awohld

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.