/usr/sbin/grpck local buffer overflow exploit. Note that grpck is not setuid by default. Tested on Red Hat 7.3 and 8.0, Cobalt Linux 6.x and 7.x, Debian 2.1 and 2.2, and Mandrake 8.1 and 8.2.
2f0dd037d94f0621fdf5899a98d3b4876af41cefc6e9b04e0ac95bd98280d88a