vulpkg1 - contains example of overwriting pointer for special privileges
	(this uses a filename pointer with /root/.rhosts as the example)

vulpkg2 - contains example of overwriting a function pointer to execute a special 
	function (i.e. system()) in the PLT

vulpkg3 - this demonstrates overwriting a function pointer to reflect back
	to argv, executing shellcode passed as an argument

vulpkg4 - overwritings a pointer into a jmp_buf, fits in theme of vulpkg3