COMMAND

    portmap

PROBLEM

    On BSD  systems, the  portmap is  used to  convert TCP/IP protocol
    port numbers into RPC program  numbers. A host can gain  access to
    another  host's  file  systems  by  tricking  its  portmapper into
    making NFS requests. Because NFS trusts the portmapper, one  could
    gain access to an exported file system.  Since most exported  file
    systems are user home directories, this vulnerability can be  used
    as a stepping stone to gaining root access.