Re: hard links create local DoS vulnerability and security problems

Michael Buesch
2003-11-24T18:21:55Z

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On Monday 24 November 2003 18:57, Jakob Lell wrote:
> > > To solve the problem, the kernel shouldn't allow users to create hard
> > > links to
> > > files belonging to someone else.
> >
> > No. Users must be able to create hard links to files that belong
> > to somebody else if they are readable. It's a requirement.
>
> If this is REALLY neccessary, it might be possible to prevent hard links to
> setuid binaries.

What about _not_ modifying the mainstream-kernel behaviour,
but adding an option, to make users unable to create such hard-links,
to selinux and/or grsec?

> Regards
> Jakob

- --
Regards Michael Buesch [ http://www.tuxsoft.de.vu ]
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