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SubjectRe: 2.2.0 SECURITY


On Wed, 27 Jan 1999, Richard Gooch wrote:

> 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....

Worked for me on a Dual PPro 300. rebooted at ldd core.

~~Kev


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