Re: [HACKERS] SSL over Unix-domain sockets

Alvaro Herrera wrote:
> Andrew Dunstan wrote:
>
>> Alvaro Herrera wrote:
>>
>>> Andrew Dunstan wrote:
>>>
>>>
>>>
>>>> I agree. I remain of the opinion that this is not a problem than can be
>>>> solved purely within the bounds of postgres.
>>>>
>>> I agree. Please comment on my proposed solution.
>>>
>> I'm not sure tmp cleaners will work that well against a determined spoofer.
>>
>
> I don't understand. The tmp cleaner is something we have to _avoid_.
> Let me repeat my proposal.
>
> I propose to create a dangling symlink on system startup in
> /tmp/.s.PGSQL.<port> to the real socket, which is not on a
> world-writable directory. This avoids the spoofer, because he cannot
> create the socket -- the symlink is occupying its place.
>
> The only problem with this proposal is that the tmp cleaner would remove
> the symlink. The solution to this is to configure the tmp cleaner so
> that it doesn't do that.
>
> It absolutely requires cooperation from the sysadmin, both to setup the
> symlink initially, and to configure the tmp cleaner.
>

Oh. I'm sorry. Yes, I think this would work.

cheers

andrew