[4552] in bugtraq
Re: Fun with devices [was: Re: /dev/tcx0 crashes SunOS 4.1.4 on
daemon@ATHENA.MIT.EDU (Doug Hughes)
Thu May 22 16:44:43 1997
Date: Thu, 22 May 1997 13:24:58 -0500
Reply-To: Doug Hughes <doug@ENG.AUBURN.EDU>
From: Doug Hughes <doug@ENG.AUBURN.EDU>
X-To: Walter Hafner <hafner@FORWISS.TU-MUENCHEN.DE>
To: BUGTRAQ@NETSPACE.ORG
In-Reply-To: <199705210752.JAA14311@forwiss.tu-muenchen.de>
On Wed, 21 May 1997, Walter Hafner wrote:
> -> If you try to read /dev/tcx0 on a SunOS 4.1.4 Sparc 20 (it didn't
> -> work on a 10; didn't have access to a Sparc 5, so I couldn't check
> -> that), you will cause a system panic. How do you read it, you ask?
> -> Simply "cat /dev/tcx0" or "ls /dev/tcx0/*". You don't need special
>
> Since we're speaking of devices: Ever tried the 'cat /dev/zero >
> /dev/keyboard' on a SunOS machine? :-) No special rights required. I
> didn't try it lately, but anything from a Sparc1 to a Sparc10 under
> SunOS is dead.
>
These sorts of things are easily taken care of with
/etc/fbtab on SunOS4 and /etc/logindevperm on Solaris2.
Any framebuffer, keyboard, mouse, audio device, etc
should have an entry here to prevent these sorts of pranks.
____________________________________________________________________________
Doug Hughes Engineering Network Services
System/Net Admin Auburn University
doug@eng.auburn.edu
