Re: swapfile security weakeness

Alexander Viro (viro@math.psu.edu)
Fri, 6 Nov 1998 05:39:27 -0500 (EST)


On Thu, 5 Nov 1998, Jakub Vlasek wrote:

> Hi,
> i've found that active swapfile could be deleted, which is
> IMHO very dangerous (set immutable flag on in sys_swapon call?). Also,
So, you are saying that combination of (a) using swapfile and (b)
putting it into the world-writable directory may lead to problems. Hmm...
Kinda have to agree with that. OTOH if admin was clueless enough to do
that he may as well make /etc world-writable.
> sys_swapon should check whether owner of swapfile is root and is readable
> only to root ( memory readableby anyone? hmm...)
Erm... Maybe admin in question should do that?

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