Messages in this thread | | | Subject | Re: Linux login security approaches | Date | Thu, 10 Dec 1998 10:24:32 -0600 (EST) | From | kwrohrer@ce ... |
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And lo, Mirian Crzig Lennox saith unto me: > > Wesley Morgan <morganw@engr.sc.edu> writes: > > On Tue, 8 Dec 1998, Neil Conway wrote: > > > > > Jeez, wrong on both counts. No-one needs to replace /bin/login, simply > > > print a message to the screen saying "Linux blah \n login:" and then > > > wait for someone to take the bait. > > > > > > Secondly, NT's C-A-D requirement DOES prevent this, and thus DOES add > > > security, AND to make things better, I don't see how it makes life any > > > harder for users - it's just some keys you press to get a login screen. > > > > This whole argument is stupid... If you have access to the console then > > chances are you don't need the root password to get root. Bring out your > > handy floppy disk and manually edit /etc/shadow or whatever you want. > > You'll probably get a million responses to this but: if the PC's BIOS > is password protected and set to not boot off of anything but the "C:" > drive, this attack won't work. Well, then short the jumper. Or plug the main hard drive into a laptop, munge /etc/shadow or /etc/passwd, and reboot.
> If the PC's case is physically locked > so that it can't be easily opened, a cracker at the console will not > be able to easily compromise the system. A cracker with a luser account will still be able to log in on the console and run their fake login screen program.
> SAK is a good thing, and I wouldn't mind seeing Linux support it > (optionally) in some form. A handy root-only getty, coupled with good physical security for the console, is more than adequate in my book. And it should be trivial to make a root- only getty, adding one test to the source code of that getty. Wonderful stuff, that sourceluke.
Keith
-- "Well, look at that. The sun's | Linux: http://www.linuxhq.com |"Zooty, coming up." -- John Sheridan, | KDE: http://www.kde.org | zoot "Sleeping in Light", Babylon 5 | Keith: kwrohrer@enteract.com | zoot!" www.midwinter.com/lurk/lurker.html | http://www.enteract.com/~kwrohrer | --Rebo
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