full-disclosure - Re: Filezilla's silent caching of user's credentials

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Message-ID: <AANLkTik1R1mN-Ei+yc5srqktNSmNd396AOJka1UKirig@mail.gmail.com>
Date: Thu, 14 Oct 2010 08:39:29 +0200
From: Christian Sciberras <uuf6429@...il.com>
To: michaelslists@...il.com
Cc: full-disclosure@...ts.grok.org.uk, Mutiny <mutiny@...inbeardsucks.com>
Subject: Re: Filezilla's silent caching of user's
	credentials

> Not all attackers are created
> equally.

I still see this a simple matter of violating KISS to introduce a layer of
encryption.
The question is, to which end? Sure, an attacker might see the encrypted
file
and think it's "too difficult" for him to get to the passwords. Another
might use
a certain utility to decrypt the said file. The thing is, to which end are
we encrypting
the data? Just for the sake of making it work like the N other programs?
I mean, if this doesn't *work*, why even *bother*?

> There is no question here. There is no discussion. It should be done,
> and if it is not, password saving should be stopped in FileZilla or an
> alternative program should be sought. It's that simple.

Great. If it's so simple that it can be done in under 10 mins, go complain
to them.

As to "go read our awesome security standards we created", that is the exact
reason
why I consider this "security feature" completely useless.

Cheers,
Chris.

On Thu, Oct 14, 2010 at 2:08 AM, silky <michaelslists@...il.com> wrote:

> On Thu, Oct 14, 2010 at 10:57 AM, Christian Sciberras <uuf6429@...il.com>
> wrote:
> > If the encryption key stays on the same PC, there is absolutely no
> security
> > in that. Given that this is open source, security through obscurity can't
> > even start working (-> encrypting local files with a local key / using
> > custom algo == security through obscurity).
>
> No, you are completely wrong and I encourage you to specifically
> consider a layered threat model or perhaps just read the information
> *already presented* in this thread. Not all attackers are created
> equally.
>
> There is no question here. There is no discussion. It should be done,
> and if it is not, password saving should be stopped in FileZilla or an
> alternative program should be sought. It's that simple.
>
> (Note that BeyondCompare and probably at least N other programs out
> there *do* perform a trivial encoding of the passwords, and it is a
> good and appropriate policy).
>
>
> > Chris.
>
> --
> silky
>
> http://dnoondt.wordpress.com/
>
> "Every morning when I wake up, I experience an exquisite joy — the joy
> of being this signature."
>

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