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Dancer2-0.02
⭐ Starred 552 / Dancer2::Core::Role::Headers
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::Core::Role::Headers - Role for handling headers

VERSION

version 0.02

DESCRIPTION

When a class consumes this role, it gets a headers attribute and all the helper methods to manipulate it.

This logic is contained in this role in order to reuse the code between Dancer::Core::Response and Dancer::Core::Request objects.

ATTRIBUTES

headers

The attribute that store the headers in a HTTP::Headers object.

That attribute coerces from ArrayRef and defaults to an empty HTTP::Headers instance.

METHODS

header($name)

Return the value of the given header, if present. If the header has multiple values, returns the list of values if called in list context, the first one if in scalar context.

push_header

Add the header no matter if it already exists or not.

$self->push_header( 'X-Wing' => '1' );

It can also be called with multiple values to add many times the same header with different values:

$self->push_header( 'X-Wing' => 1, 2, 3 );

headers_to_array

Convert the headers attribute to an ArrayRef.

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.