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Dancer-1.3522
⭐ Starred 738 / Dancer::Config::Object
Security Advisories (1)
CVE-2026-5080 (2026-04-30)

Dancer::Session::Abstract versions through 1.3522 for Perl generates session ids insecurely. The session id is generated from summing the character codepoints of the absolute pathname with the process id, the epoch time and calls to the built-in rand() function to return a number between 0 and 999-billion, and concatenating that result three times. The path name might be known or guessed by an attacker, especially for applications known to be written using Dancer with standard installation locations. The epoch time can be guessed by an attacker, and may be leaked in the HTTP header. The process id comes from a small set of numbers, and workers may have sequential process ids. The built-in rand() function is seeded with 32-bits and is considered unsuitable for security applications. Predictable session ids could allow an attacker to gain access to systems.

NAME

Dancer::Config::Object - Access the config via methods instead of hashrefs

VERSION

version 1.3522

DESCRIPTION

If strict_config is set to a true value in the configuration, the config() subroutine will return an object instead of a hashref. Instead of this:

my $serializer = config->{serializer};
my $username   = config->{auth}{username};

You get this:

my $serializer = config->serializer;
my $username   = config->auth->username;

This helps to prevent typos. If you mistype a configuration name:

my $pass = config->auth->pass;

An exception will be thrown, tell you it can't find the method name, but listing available methods:

Can't locate config attribute "pass".
Available attributes: password, username

If the hash key cannot be converted into a proper method name, you can still access it via a hash reference:

my $some_value = config->{'99_bottles'};

And call methods on it, if possible:

my $sadness = config->{'99_more_bottles'}->last_bottle;

Hash keys pointing to hash references will in turn have those "objectified". Arrays will still be returned as array references. However, hashrefs inside of the array refs may still have their keys allowed as methods:

my $some_value = config->some_list->[1]->host;

METHOD NAME DEFINITION

We use the following regular expression to determine if a hash key qualifies as a method:

/^[[:alpha:]_][[:word:]]*$/;

Note that this means naïve (note the dots over the i) can be a method name, but unless you use utf8; to declare that your source code is UTF-8, you may have disappointing results calling config->naïve. Further, depending on your version of Perl and the software to read your config file ... well, you get the idea. We recommend sticking with ASCII identifiers if you wish your code to be portable.

Patches/suggestions welcome.

AUTHOR

This module has been written by Alexis Sukrieh <sukria@cpan.org> and others, see the AUTHORS file that comes with this distribution for details.

LICENSE

This module is free software and is released under the same terms as Perl itself.

SEE ALSO

Dancer and Dancer::Config.

AUTHOR

Dancer Core Developers

COPYRIGHT AND LICENSE

This software is copyright (c) 2010 by Alexis Sukrieh.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.