On Mon, Apr 13, 2015 at 9:38 AM, Heikki Linnakangas <hlinnaka@iki.fi> wrote:
> On 04/10/2015 05:17 AM, Robert Haas wrote:
>>
>> On Apr 9, 2015, at 8:51 PM, Heikki Linnakangas <hlinnaka@iki.fi> wrote:
>>>
>>> What should we do about this?
>>
>>
>> I bet that there are at least 1000 covert channel attacks that are more
>> practically exploitable than this.
>
>
> Care to name some? This is certainly quite cumbersome to exploit, but it's
> doable.
>
> We've talked a lot about covert channels and timing attacks on RLS, but this
> makes me more worried because you can attack passwords stored in pg_authid.
Isn't the attack mentioned on this thread true as long as a user knows
that a given table stores a password? I don't see why this would be
limited to pg_authid.
--
Michael