CVE-2019-7644

Auth0 Auth0-WCF-Service-JWT before 1.0.4 leaks the expected JWT signature in an error message when it cannot successfully validate the JWT signature. If this error message is presented to an attacker, they can forge an arbitrary JWT token that will be accepted by the vulnerable application.

Auth0 Auth0-WCF-Service-JWT before 1.0.4 leaks the expected JWT signature in an error message when it cannot successfully validate the JWT signature. If this error message is presented to an attacker, they can forge an arbitrary JWT token that will be accepted by the vulnerable application.

En Auth0-WCF-Service-JWT de Auth0 anterior a la versión 1.0.4, pierde la firma JWT esperada en un mensaje de error cuando no puede comprobar exitosamente la firma JWT. Si este mensaje de error es presentado a un atacante, pueden falsificar un token JWT arbitrario que será aceptado por la aplicación vulnerable.