Re: [Patch] TIOCCONS security

[Christoph Hellwig]

On Wed, Aug 25, 2004 at 05:11:06PM +0200, Olaf Dabrunz wrote:
> Hi,
> 
> the ioctl TIOCCONS allows any user to redirect console output to another
> tty. This allows anyone to suppress messages to the console at will.
> 
> AFAIK nowadays not many programs write to /dev/console, except for start
> scripts and the kernel (printk() above console log level).
> 
> Still, I believe that administrators and operators would not like any
> user to be able to hijack messages that were written to the console.
> 
> The only user of TIOCCONS that I am aware of is bootlogd/blogd, which
> runs as root. Please comment if there are other users.

Oh, common.  Do your basic research - this has been rejected a few times
and there have been better proposals.  Just use goggle a little bit.

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