Messages in this thread |  | | Subject | Re: BTTV detection broken in 2.4.0-test11-pre5 | Date | Sun, 19 Nov 2000 16:08:37 +0100 (CET) | From | (Christer Weinigel) |
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In article <Pine.LNX.4.30.0011190710440.13087-100000@anime.net> you write: >On Sun, 19 Nov 2000, Alexander Viro wrote: >> On Sun, 19 Nov 2000, David Lang wrote: >> > there is a rootkit kernel module out there that, if loaded onto your >> > system, can make it almost impossible to detect that your system has been >> > compramised. with module support disabled this isn't possible. >> Yes, it is. Easily. If you've got root you can modify the kernel image and >> reboot the bloody thing. And no, marking it immutable will not help. Open >> the raw device and modify relevant blocks. > >Kernel on writeprotected floppy disk...
So change the CMOS-settings so that the BIOS changes the boot order from A, C, CD-ROM to C first instead. *grin* How long do you want to keep playing Tic-Tac-Toe?
Of course, using capabilities and totally disabling access to the raw disk devices and to any I/O ports might be the solution, provided that there are no bugs or thinkos in the capabilities code.
/Christer -- "Just how much can I get away with and still go to heaven?" - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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