Your parens are a bit off in the if. Try ...

if ( $param_cmd and $param_cmd =~ /^([-.0-9a-zA-Z]+)$/ ) {

Note the addition of parens in the regexp so that you save it in $1, as the way you had it would have set $param_cmd to be undefined.

Also, there's no need for qw() which would've passed a different argument than you expected ...

system( "/usr/sbin/traceroute", $param_cmd );

  --k.

( Ain't life^H^H^H^Hsecurity a biiyatch? :)

In reply to RE: RE: Possible Security Hole by Kanji
in thread CGI and Traceroute by Anonymous Monk

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.