Firewall configured with unanimous strategy was not actually unanimous in Symfony
Description
On Symfony before 4.4.0, when a Firewall checks an access control rule (using the unanimous strategy), it iterates over all rule attributes and grant access only if all calls to the accessDecisionManager decide to grant access.
As of Symfony 4.4.0, a bug was introduced that prevents the check of attributes as soon as accessDecisionManager decide to grant access on one attribute.
Resolution
The accessDecisionManager is now called with all attributes at once, allowing the unanimous strategy being applied on each attribute.
The patch for this issue is available here for the 4.4 branch.
Credits
I would like to thank Antonio J. García Lagar for reporting & Robin Chalas for fixing the issue.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | symfony/security | >= 4.4.0, < 4.4.7, >= 5.0.0, < 5.0.7 | 4.4.7, 5.0.7 |
| Paquete de Composer | symfony/security-http | >= 4.4.0, < 4.4.7, >= 5.0.0, < 5.0.7 | 4.4.7, 5.0.7 |
| Paquete de Composer | symfony/symfony | >= 4.4.0, < 4.4.7, >= 5.0.0, < 5.0.7 | 4.4.7, 5.0.7 |
Referencias
- https://github.com/symfony/symfony/security/advisories/GHSA-g4m9-5hpf-hx72
- https://nvd.nist.gov/vuln/detail/CVE-2020-5275
- https://github.com/symfony/symfony/commit/c935e4a3fba6cc2ab463a6ca382858068d63cebf
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2020-5275.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2020-5275.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5275.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ
- https://symfony.com/cve-2020-5275
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N- Debilidad (CWE)
CWE-285- Plataforma
- Composer
- Paquete
symfony/security, symfony/security-http, symfony/symfony- Publicada
- 30.03.2020
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-g4m9-5hpf-hx72 - CC BY 4.0
Historial de vulnerabilidades: symfony/symfony
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 100
- Primera → última
- 11.2019 06.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 8
- Alta 28
- Media 51
- Baja 13
Divulgaciones por año
- 2019: 6
- 2020: 7
- 2021: 6
- 2022: 29
- 2023: 5
- 2024: 16
- 2025: 1
- 2026: 30
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