Actually there is nothing wrong with the behaviour you would get with the patch and your test case (removing the -T to simulate the effect of the patch as crlf will match ^[\w:]+$ 

[root@devel3 root]# TAINTED=crlf;export TAINTED
[root@devel3 root]# perl5.8.3 -e 'print $ENV{TAINTED},$/;'
crlf
[root@devel3 root]# perl5.8.3 -e 'use PerlIO $ENV{TAINTED};'
Can't locate PerlIO/crlf.pm in @INC (@INC contains: /usr/local/lib/per
+l5/5.8.3/i686-linux-thread-multi /usr/local/lib/perl5/5.8.3 /usr/loca
+l/lib/perl5/site_perl/5.8.3/i686-linux-thread-multi /usr/local/lib/pe
+rl5/site_perl/5.8.3 /usr/local/lib/perl5/site_perl .) at (eval 1) lin
+e 3.
[root@devel3 root]#

[download]

All that patching it to untaint \w: chars does is allow you to call an artitrary PerlIO::Widget::Whotnot. That module still has to exist or it will just explode.

You could make a good argument for a patch like: 

corak "No way hosay...." unless $layer =~ m/^([\w:]+)$/;
$layer = $1;
eval "....

[download]

cheers

tachyon

In reply to Re: no PerlIO $ENV{TAINTED}; by tachyon
in thread Perl 5.8.0 PerlIO insecure dependency by bplatz

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