我不明白 Perl Taint 模式错误消息

I don't understand the Perl Taint mode error message

有人告诉我,我有一些旧的 Perl 代码容易受到跨站点脚本攻击或 SQL 注入攻击。我想通过将 shebang 从 #!/usr/local/bin/perl 更改为 #!/usr/local/bin/perl -T 来打开污染模式,现在我收到此错误消息:

Insecure dependency in require while running with -T switch at <big long path>/main.cgi line 26.

代码如下所示:

  1 #!/usr/local/bin/perl  -T
.
.
.
 12 use strict;
 13
 14 use vars qw( %opt $VERSION );
 15
 16 use CGI qw/:standard *table start_ul/;
 17 use CGI qw(:debug);
 18 use CGI::Carp qw( fatalsToBrowser );
 19 #use CGI::Pretty qw( :html3 );
 20 $CGI::Pretty::INDENT = "    ";
 21 use Tie::IxHash;
 22 use FindBin qw($Bin); 
 23 use lib "$Bin/../../lib";
 24 use lib "$Bin/../lib";
 25
 26 use Common::Config;

Common::Config 拥有此所有权和权限:

$ ls -l lib/Common/Config.pm
-r--r--r--. 1 someguy example 5840 Oct  9 20:08 lib/Common/Config.pm

我尝试将所有权更改为 apache,但我仍然收到污点错误消息。

更新:

我试过像这样清除我的 $Bin 变量:

use FindBin qw($Bin);           # Where are we ?
if ($Bin =~ /^([-\@\w.]+)$/) {
        $Bin = ;                      # $data now untainted
} else {
        die "Bad data in '$Bin'";       # log this somewhere
}

但我仍然收到关于 use Common::Config;

的污点错误

您是否有 use lib 语句将不安全的变量添加到包含路径?

https://perldoc.perl.org/perlsec.html

Note that if a tainted string is added to @INC, the following problem will be reported:

Insecure dependency in require while running with -T switch