/ 
Dancer2-0.10
⭐ Starred 552 / dancer2
Security Advisories (2)
CPANSA-Dancer2-2018-01 (2018-01-30)

There is a potential RCE with regards to Storable. We have added session ID validation to the session engine so that session backends based on Storable can reject malformed session IDs that may lead to exploitation of the RCE.

CVE-2026-13577 (2026-07-20)

Dancer2 versions through 2.1.0 for Perl generate insecure session ids when required CSPRNG modules are unavailable. Dancer2::Core::Role::SessionFactory::generate_id silently falls back to a built-in rand-derived session id unless both Math::Random::ISAAC::XS and Crypt::URandom are available. The fallback session id is generated from a SHA-1 hash of a call to the built-in rand function, the absolute path of the Dancer2::Core::Role::SessionFactory module, an internal counter, the process id, the module instance memory address, and a shuffled string of characters (using the List::Util::shuffle function, which also uses the built-in rand function). These are all low-entropy and easily guessed sources. The built-in rand() function is seeded with 32-bits and considered unsuitable for security applications. Predictable session ids could allow an attacker to gain access to systems.

NAME

dancer2 - helper script to create new Dancer2 applications

VERSION

version 0.10

SYNOPSIS

dancer2 [options] -a <appname>

DESCRIPTION

Helper script for providing a bootstrapping method to quickly and easily create the framework for a new Dancer2 application.

NAME

dancer2 - helper script to create new Dancer2 applications

OPTIONS

-h, --help            : print what you are currently reading
-a, --application     : the name of your application
-p, --path            : the path where to create your application
                          (current directory if not specified)
-x, --no-check        : don't check for the latest version of Dancer2
                          (checking version implies internet connection)
-v, --version         : print the version of dancer2 being used

EXAMPLE

Here is an application created with dancer2:

$ dancer2 -a MyWeb::App
+ MyWeb-App
+ MyWeb-App/bin
+ MyWeb-App/bin/app.pl
+ MyWeb-App/config.yml
+ MyWeb-App/environments
+ MyWeb-App/environments/development.yml
+ MyWeb-App/environments/production.yml
+ MyWeb-App/views
+ MyWeb-App/views/index.tt
+ MyWeb-App/views/layouts
+ MyWeb-App/views/layouts/main.tt
+ MyWeb-App/MANIFEST.SKIP
+ MyWeb-App/lib
+ MyWeb-App/lib/MyWeb
+ MyWeb-App/lib/MyWeb/App.pm
+ MyWeb-App/public
+ MyWeb-App/public/css
+ MyWeb-App/public/css/style.css
+ MyWeb-App/public/css/error.css
+ MyWeb-App/public/images
+ MyWeb-App/public/500.html
+ MyWeb-App/public/404.html
+ MyWeb-App/public/dispatch.fcgi
+ MyWeb-App/public/dispatch.cgi
+ MyWeb-App/public/javascripts
+ MyWeb-App/public/javascripts/jquery.js
+ MyWeb-App/t
+ MyWeb-App/t/002_index_route.t
+ MyWeb-App/t/001_base.t
+ MyWeb-App/Makefile.PL

The application is ready to serve:

$ cd MyWeb-App
$ ./bin/app.pl
>> Listening on 127.0.0.1:3000
== Entering the development dance floor ...

AUTHOR

This script has been written by Sebastien Deseille <sebastien.deseille@gmail.com> and Alexis Sukrieh <sukria@cpan.org>.

SOURCE CODE

See Dancer2 for more information.

LICENSE

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

AUTHOR

Dancer Core Developers

COPYRIGHT AND LICENSE

This software is copyright (c) 2013 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.