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Dancer-1.1902 UNAUTHORIZED RELEASE
⭐ Starred 738 / Dancer::Engine
Security Advisories (3)
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.

CVE-2012-5572 (2014-05-30)

CRLF injection vulnerability in the cookie method allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a cookie name.

CVE-2011-1589 (2011-04-05)

Directory traversal vulnerability (Mojolicious report, but Dancer was vulnerable as well).

NAME

Dancer::Engine - base class for Dancer engines

SYNOPSIS

my $engine = Dancer::Engine->build( Serializer => 'JSON', $configuration );

DESCRIPTION

Dancer has various engines such Serializer engines, Template engines, Logger engines and Session handlers engines. This is the base class for all Dancer engines.

If you're writing an engine of a common type (such as those mentioned above), you probably want to simply use their base class, which in turn use Dancer::Engine. For example, Template engines inherit from Dancer::Template::Abstract and Serializer engines inherit from Dancer::Serializer::Abstract. Those Abstract base classes inherit from Dancer::Engine.

If a new type of Dancer engine is created, it is best it inherits from this class.

ATTRIBUTES

name

The name of the engine, such as JSON, or Simple.

type

The type of the engine, such as Serializer, or Session.

METHODS/SUBROUTINES

config

Fetches the configuration of the engine.

my $configuration = $engine->config;

You can only set the configuration at initialization time, not after.

build

Builds and returns the engine.

my $engine = Dancer::Engine->build( $type => $name, $config );

AUTHOR

Alexis Sukrieh

LICENSE AND COPYRIGHT

Copyright 2009-2010 Alexis Sukrieh.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.