Scripsis, quam aut quem »Krzysztof Halasa« appellare soleo: > Rudolf Polzer <[EMAIL PROTECTED]> writes: > > However, pool computers like in this case are neither servers nor > > terminals. If they were terminals, we would need about 30 servers to > > handle the load of 100 active students. So they are workstation > > installations that do most of the work locally. > > Ok. So they are exposed to known attacks with quite high probability.
Which others? Are there other places that assume only trusted users can access the console? > >> Hope they don't change the keys in the process. > > > > They HAVE to do that, > > Well, I meant physical keys to match them to loaded keymaps :-) ;) > > However, Xorg and XFree86 have about the same problem: you can remap > > Ctrl-Alt-Backspace. So it would be good if the SAK also worked there which > > would require it to set a "sane" video mode. > > I assume that one can notice that Ctrl-Alt-Backspace doesn't work, > and stop there. Not if a malicious X program does "chvt 1; chvt 7" when Ctrl-Alt-Backspace is pressed. > I think SAK/X11 video mode issue is possible to fix, though. It would require a video driver that can actually reset the video mode. Framebuffer drivers usually can do that. For the standard VGA text mode, at least savetextmode/restoretextmode from svgalib don't work on the graphics cards I have.