CVE-2021-39172

Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.

Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.

### Impact Authenticated users, regardless of their privileges (_User_ or _Admin_), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. ### Patches This issue was addressed by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. ### Workarounds Only allow trusted source IP addresses to access to the administration dashboard. ### References - https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection ### For more information If you have any questions or comments about this advisory, you can contact: - The original reporters, by sending an email to vulnerability.research [at] sonarsource.com; - The maintainers, by opening an issue on this repository.

### Impact Authenticated users, regardless of their privileges (_User_ or _Admin_), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. ### Patches This issue was addressed by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. ### Workarounds Only allow trusted source IP addresses to access to the administration dashboard. ### References - https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection ### For more information If you have any questions or comments about this advisory, you can contact: - The original reporters, by sending an email to vulnerability.research [at] sonarsource.com; - The maintainers, by opening an issue on this repository.

Cachet es un sistema de páginas de estado de código abierto. versiones anteriores a 2.5.1, unos usuarios autenticados, independientemente de sus privilegios (Usuario o Administrador), pueden explotar una nueva inyección de línea en la funcionalidad configuration edition (por ejemplo, la configuración del correo) y obtener una ejecución de código arbitrario en el servidor. Este problema fue solucionado en versión 2.5.1, al mejorar "UpdateConfigCommandHandler" y evitando el uso de caracteres de nuevas líneas en los nuevos valores de configuración. Como solución, sólo permita que direcciones IP de origen confiable accedan al panel de administración.