Permissions

Hi everyone, I'm looking for some information concerning Unix permissions. I am new to Unix and am doing research for a graduate class. Given the permissions below, can anyone give me five unique exploits that would be available to a hacker/cracker given this configuaration?

 -rw-rw-rw-  1  root  root 948    Feb 04  08:32  shadow
 -rwxrwxrwx  1  root  root 1823  Feb 04  08:32  passwd

I have been trying to do Google searches and have not been having much luck wading through all of the hits. Any help will be greatly appreciated. Thanks and have a great day.

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I will close this thread.