full-disclosure - Re: Linux kernel scm

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Message-ID: <20041215204828.GL1598@hyper>
From: gadgeteer at elegantinnovations.org (gadgeteer@...gantinnovations.org)
Subject: Re: Linux kernel scm_send local DoS

On Wed, Dec 15, 2004 at 01:31:30PM +0100, Paul Starzetz (ihaquer@...c.pl) wrote:
> I don't think this is practicable, since the bugs reside in deep kernel 
> functions. You can not fix it just by disabling a particular syscall. You 
> have patch a running kernel binary, maybe someone comes up with this kind 
> of utlility.

Not by disabling the syscall but by replacing it in the manner that a
rootkit replaces syscalls.  Build a new kernel from the same
source/config except for patch.  Replace syscalls where there is change.
Practical?
Stable?
No.  Much easier to simply reboot to new kernel.  If service(s) are so
critical as to not tolerate a reboot yet have a single point of failure
on this one component then there are greater problems at play.
-- 
Chief Gadgeteer
Elegant Innovations