Format string vulnerability in Novell Modular Authentication Services (NMAS) in the Novell Client 4.91 SP2 and SP3 allows users with physical access to read stack and memory contents via format string specifiers in the Username field of the logon window.

nwgina.dll in Novell Client 4.91 SP3 for Windows 2000/XP/2003 does not delete user profiles during a Terminal Service or Citrix session, which allows remote authenticated users to invoke alternate user profiles.

NWFILTER.SYS in Novell Client 4.91 SP 1 through SP 4 for Windows 2000, XP, and Server 2003 makes the \.\nwfilter device available for arbitrary user-mode input via METHODNEITHER IOCTLs, which allows local users to gain privileges by passing a kernel address as an argument and overwriting kernel memory locations.

Multiple stack-based buffer overflows in the Spooler service (nwspool.dll) in Novell Client 4.91 SP2 through SP4 for Windows allow remote attackers to execute arbitrary code via certain long arguments to the (1) RpcAddPrinterDriver, (2) RpcGetPrinterDriverDirectory, and other unspecified RPC requests, aka Novell bug 300870, a different vulnerability than CVE-2006-5854.