CVE-2016-4423
Estado: ModificadaAlta (7.5)—
The attemptAuthentication function in Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php in Symfony before 2.3.41, 2.7.x before 2.7.13, 2.8.x before 2.8.6, and 3.0.x before 3.0.6 does not limit the length of a username stored in a session, which allows remote attackers to cause a denial of service (session storage consumption) via a series of authentication attempts with long, non-existent usernames.
CVSS
- Versión: 3.0
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.86%
- Percentil entre todas las CVEs puntuadas: 79
- Fecha de la puntuación: 7/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (2)
CWE
- CWE-399
Referencias
- http://www.debian.org/security/2016/dsa-3588
- https://github.com/symfony/symfony/pull/18733
- https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session
- http://www.debian.org/security/2016/dsa-3588
- https://github.com/symfony/symfony/pull/18733
- https://symfony.com/blog/cve-2016-4423-large-username-storage-in-session
JSON original (NVD)
Mostrar
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