It is possible to manipulate the JWT token without the knowledge of the JWT secret and authenticate without valid JWT token as any user. This is happening only in the situation when zOSMF doesn’t have the APAR PH12143 applied. This issue affects: 1.16 versions to 1.19. What happens is that the services using the ZAAS client or the API ML API to query will be deceived into believing the information in the JWT token is valid when it isn’t. It’s possible to use this to persuade the southbound service that different user is authenticated.

Conformance validation endpoint discloses detail about service to unauthenticated users

The conformance validation endpoint is public so everybody can verify the conformance of onboarded services. The response could contain specific information about the service, including available endpoints, and swagger. It could advise about the running version of a service to an attacker. The attacker could also check if a service is running.

Health endpoint offers list of onboarded services to unauthenticated users

The health endpoint is public so everybody can see a list of all services. It is potentially valuable information for attackers.