Remote Root Vulnerability in rpcbind portmapper
RPC (Remote Procedure Call) allows a program to request a service from a program located in another computer in a network without requiring detailed information on the network configuration. An attacker capable of forging a pmap_set/pmap_unset udp packet can cause the remote host to register or unregister arbitrary RPC programs. This can permit an attacker to carry out a denial of services by disabling key services on the target host, including mountd, nfsd and ypserv. Because it allows a malicious local user to register rpc programs on the server, depending on the program the attacker chooses to register, this vulnerability can allow a compromise of root privilege, potentially extending to other systems on the local network.