On 3/21/07, S. Robert James <[EMAIL PROTECTED]> wrote:
> IMO, we need to rethink moving to cookie sessions by default, then -
> if a core member hadn't thought about, what can we expect from
> beginners? Last thing we need is a reputation for being weak in
> security.

I think that's a bit sensational.  The cookie store has gone through a
couple of evolutionary steps already and is ready for more, if need
be.


> Before everyone responds: "It will help performance, and good
> developers don't store volatile data in the session, anyway!" I'll say
> that we've seen lots of companies (who won't be named) sacrifice
> security in order to gain out of the box performance or ease of use -
> and it comes back to haunt them.  Secure by default, and let the
> advanced users make it less secure to improve performance - not the
> other way around.

Let's see a brainstorm of solutions and other potential vulnerabilities.


> > > This is normally solved using something called nonce - each signing
> > > includes a once only code, and the signer keeps track of all of the
> > > codes, and rejects any message with the code repeated.
>
> > This sounds like something you could perform at the application level.
> I don't think so - as long as step 2 (in my example) goes to one
> Mongrel, and step 4 goes to another, the attack succeeds.  I can try
> repeatedly with a script until this happens.  The only way to protect
> is to use a shared backend like the DB or DRB - but then you've lost
> the point of cookie sessions.

To some degree. I'm sure there's more to this, though. I'm not a crypto expert.

jeremy

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