Hi Folks,

Does anyone know what's going on here? I will be very thankful for a response!!

Does YAML::Tiny require one to untaint data read from a yaml file?

I recently changed my config file from Config::Tiny to YAML::Tiny

and after doing it I get a taint error message.

>>>> Insecure dependency in open while running with -T switch at testyc.pl ...

I have reduced the problem to test case below showing what's going on with using both config::tiny and yaml::tiny.

Using data from Config::Tiny does not produce an error when opening a file for output but data from YAML::Tiny does.

???

I am running:

This is perl, v5.10.0 built for i486-linux-gnu-thread-multi I have tried this w/ 1.39 and 1.41 of YAML::Tiny.

=====

file: test.configtiny

[dirs]
dir_output_base=./


=====

file: test.yaml

dirs:
  dir_output_base: ./


=====

testyc.pl (run as perl -wT testyc.pl

=====


#!/usr/bin/perl  -wT  
    use strict;
# ======================

    use YAML::Tiny;
    my $yaml = YAML::Tiny->new;
    $yaml = YAML::Tiny->read( 'test.yaml' );
    my $file1="testyc1.txt";
    print "Printing to dir: " . $yaml->[0]->{dirs}->{dir_output_base};
    print "\n";
    print "Printing to file: " . $file1;
    print "\n";

# choose one of the following lines for tainted or untainted

#    my $ut = $yaml->[0]->{dirs}->{dir_output_base};
    my $ut = $1 if ($yaml->[0]->{dirs}->{dir_output_base} =~ /(.*)/); 
+ 
    # the above line untaints anything, just for testing purpose here.
    open (my $outfile1, '>', $ut . $file1);
    print $outfile1 "hello from testyc.pl\n";
    close($outfile1);

# ======================
    use Config::Tiny;
    my $config=Config::Tiny->read('test.configtiny');
    my $file2="testyc2.txt";
    print "Printing to dir: " . $config->{dirs}->{dir_output_base};
    print "\n";
    print "Printing to file: " . $file2;
    print "\n";
    open (my $outfile2, '>', $config->{dirs}->{dir_output_base} . $fil
+e2);
    print $outfile2 "hello from testyc.pl\n";
    close($outfile2);
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