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.
The installation of Novell Netware NDS 5.99 provides an unauthenticated client with Read access for the tree, which allows remote attackers to access sensitive information such as users, groups, and readable objects via CX.EXE and NLIST.EXE.