The (1) ncpmount, (2) ncpumount, and (3) ncplogin programs in ncpfs 2.2.6 do not properly create lock files, which allows local users to cause a denial of service (application failure) via unspecified vectors that trigger the creation of a /etc/mtab~ file that persists after the program exits.

sutil/ncpumount.c in ncpumount in ncpfs 2.2.6 produces certain detailed error messages about the results of privileged file-access attempts, which allows local users to determine the existence of arbitrary files via the mountpoint name.

ncpfs 2.2.6 allows local users to cause a denial of service, obtain sensitive information, or possibly gain privileges via symlink attacks involving the (1) ncpmount and (2) ncpumount programs.