Novell 5 and earlier, when running over IPX with a packet signature level less than 3, allows remote attackers to gain administrator privileges by spoofing the MAC address in IPC fragmented packets that make NetWare Core Protocol (NCP) calls.
LOGIN.EXE program in Novell Netware 4.0 and 4.01 temporarily writes user name and password information to disk, which could allow local users to gain privileges.