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 ca…

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.