<P> A null session is an anonymous connection to an inter-process communication network service on Windows - based computers . The service is designed to allow named pipe connections but may be used by attackers to remotely gather information about the system . </P> <P> From a NULL session, hackers can call APIs and use Remote Procedure calls to enumerate information . These techniques can, and will provide information on passwords, groups, services, users and even active processors . NULL session access can also even be used for escalating privileges and perform DoS attacks . </P>

All of the following information can be collected by using netbios null sessions except