Title: Amon2::Plugin::Web::CSRFDefender de TOKUHIROM, Description: Las versiones de Amon2::Plugin::Web::CSRFDefender de la 7.00 a la 7.03 para Perl generan un ID de sesión inseguro.

La función generate_session_id intentará leer bytes del dispositivo /dev/urandom, pero si este no está disponible, entonces genera bytes usando un hash SHA-1 inicializado con la función rand() incorporada, el PID y el tiempo de época de alta resolución. El PID provendrá de un pequeño conjunto de números, y el tiempo de época puede ser adivinado, si no se filtra del encabezado HTTP Date. La función rand incorporada no es adecuada para uso criptográfico.

Las versiones de Amon2::Plugin::Web::CSRFDefender anteriores a la 7.00 formaban parte de Amon2, el cual era vulnerable a IDs de sesión inseguros debido a CVE-2025-15604.

Tenga en cuenta que el autor ha desaprobado este módulo.

{"timestamp":"2026-04-08T16:09:08.752556Z","id":"CVE-2026-5082","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"TOKUHIROM","product":"Amon2::Plugin::Web::CSRFDefender","defaultStatus":"unaffected","collectionURL":"https://cpan.org/modules","packageName":"Amon2-Plugin-Web-CSRFDefender","programFiles":["lib/Amon2/Plugin/Web/CSRFDefender/Random.pm"],"programRoutines":[{"name":"Amon2::Plugin::Web::CSRFDefender::Random::generate_session_id"}],"repo":"https://github.com/tokuhirom/Amon2-Plugin-Web-CSRFDefender","versions":[{"version":"7.00","lessThanOrEqual":"7.03","versionType":"custom","status":"affected"}]}]

OR
          *cpe:2.3:a:tokuhirom:amon2::plugin::web::csrfdefender:*:*:*:*:*:perl:*:* versions from (including) 7.00 up to (including) 7.03

CPANSec: https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.03/source/lib/Amon2/Plugin/Web/CSRFDefender/Random.pm Types: Product

CPANSec: https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.04/changes Types: Release Notes

CPANSec: https://www.cve.org/CVERecord?id=CVE-2025-15604 Types: Third Party Advisory

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id.

The generate_session_id function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes using SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time.  The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.

Amon2::Plugin::Web::CSRFDefender versions before 7.00 were part of Amon2, which was vulnerable to insecure session ids due to CVE-2025-15604.

Note that the author has deprecated this module.

CWE-338

CWE-340

https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.03/source/lib/Amon2/Plugin/Web/CSRFDefender/Random.pm

https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.04/changes

https://www.cve.org/CVERecord?id=CVE-2025-15604