Re: 2.2.0 SECURITY

Richard Gooch (rgooch@atnf.csiro.au)
Wed, 27 Jan 1999 15:56:23 +1100

Dan Burcaw writes:
>
> There is a bug that works only on the 2.2.0 kernel that will allow root
> and non-root users to crash the machine (the system reboots).
>
> To replicate this bug do following:
>
> Take any core file, and as normal user or root run: ldd core
>
> The machine will reboot, saying that it cannot get execution permissions
> for ./core
>
> As far as I can tell, this problem only affects x86 machines running
> 2.2.0. I know that PPC is not affected.

Just tried this on a dual PPro:

% cat > try.c
void main ()
{
* (unsigned int *) 0 = 0;
}
% cc -o try try.c
% ./try
Segmentation fault
% ldd core
% dmesg | tail -1
perfmon: v0.4 (19990127) Richard Gooch (rgooch@atnf.csiro.au), 2 counters

Nope, doesn't cause a reboot, panic, Oops or any problems
here. Running as root makes no difference.

Regards,

Richard....

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