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Re: Separate tmp-dir for every user?

On Mon, Dec 01, 2008 at 03:12:29PM +0100, Paul van der Vlis wrote:
> Hello,
> I am installing a new shared hosting server, and I would like to know
> how important it is to have a seperate tmp-dir for every user.
> What are the disadvantages/risks of a shared tmp-dir?

Can you really elliminate the need for a shared /tmp? I guess you would
be really lucky not to come across an application which has /tmp
hardcoded and does not consult $T{E,}MPDIR

As for the risks, the biggest is probably the possibility of having a
symlink attack vulnerability in one of your applications. Having
per-user tmp dirs avoids the problem for applications which will use

Marcin Owsiany <porridge@debian.org>             http://marcin.owsiany.pl/
GnuPG: 1024D/60F41216  FE67 DA2D 0ACA FC5E 3F75  D6F6 3A0D 8AA0 60F4 1216

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