I just cannot believe this. I just tested an old vixie cron exploit
against crontab. It was a clasic buffer overflow attack. I have a RH6.2
WITH UPDATES. It worked. This exploit is almost over a year old.

It's standard permistions are: -rwsr-xr-x

My advice, change the permissions on /usr/bin/crontab.

chmod 700 /usr/bin/crontab

or 

chmod 4722 /usr/bin/crontab

These permissions are more of a reminder that it should be a suid program
when you feel like permitting everyone to use crontab again.


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