LinuxQuestions.org - Is users whom have access to `wall` command a security risk?

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jon_k

08-28-2004 11:31 PM

Is users whom have access to `wall` command a security risk?

I've noticed on my server and home box any user can use wall to broadcast to the system.

I see this as potential for abuse and would like to log users who use this message to a log file.

How should I go about doing it?

Or, would it be wiser to disable it from people totally? (chmod 700)

What would you do and how would you do it?

Also, what are the aliases or commands that can do similar things, I know there is at least 3 more besides wall.

unSpawn

08-31-2004 07:31 PM

What would you do and how would you do it?
Add a group called local, add users to that group you trust. Chmod 0750 and change group of binary to local.
For root turn off capabilities using mesg.

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