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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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