Message-ID: <AANLkTin5nv0DvLn-xn8Ji1dQ4F5QyORciidE3rimw8dk@mail.gmail.com>
Date: Wed, 13 Oct 2010 15:32:14 -0700
From: Chris Evans <scarybeasts@...il.com>
To: Mutiny <mutiny@...inbeardsucks.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Filezilla's silent caching of user's
	credentials

Finally, a note of sanity in this thread.

On Tue, Oct 12, 2010 at 8:33 PM, Mutiny <mutiny@...inbeardsucks.com> wrote:

> The issue is that someone gained access to that file.  You sharing your
> drives over the internet with read privileges?  You have other
> vulnerable software being leveraged to read that file?  Would you prefer
> they MD5'd it?  It sounds like your issue is that your password is
> stored.  I mean, they moved your encrypted password from passwd to
> shadow for a reason, but that doesn't change the fact that it's stored
> and if someone doesn't need access to shadow or passwd, they shouldn't
> have it.
>
> Stop logging into your FTP server from a public terminal with Filezilla.
>
>
> On 10/9/2010 11:00 AM, Vipul Agarwal wrote:
> > That's a live and good example. I hope that now they'll understand the
> > importance of the issue.
> >
> > On Fri, Oct 8, 2010 at 11:28 AM, Shirish Padalkar
> > <shirish.padalkar@....com>wrote:
> >
> >>
> >>
> >>
> http://www.google.com/#sclient=psy&hl=en&site=&source=hp&q=inurl:recentservers.xml&oq=inurl:recentservers.xml
> >>
> >> :)
> >>
> >>
> >>  From:
> >> Ryan Sears <rdsears@....edu>
> >> To:
> >> full-disclosure <full-disclosure@...ts.grok.org.uk>
> >> Date: 10/08/2010 08:52 AM Subject:
> >> [Full-disclosure] Filezilla's silent caching of user's credentials
> >> Sent by: full-disclosure-bounces@...ts.grok.org.uk
> >> ------------------------------
> >>
> >>
> >>
> >> Hi all,
> >>
> >> As some of you may or may not be aware, the popular (and IMHO one of the
> >> best) FTP/SCP program Filezilla caches your credentials for every host
> you
> >> connect to, without either warning or ability to change this without
> editing
> >> an XML file. There have been quite a few bug and features requests
> filed,
> >> and they all get closed or rejected within a week or so. I also posted
> >> something in the developer forum inquiring about this, and received this
> >> response:
> >>
> >> "I do not see any harm in storing credentials as long as the rest of
> your
> >> system is properly secure as it should be."
> >>
> >> Source:(http://forum.filezilla-project.org/viewtopic.php?f=3&t=17932)
> >>
> >> To me this is not only concerning, but also completely un-acceptable.
> The
> >> passwords all get stored in PLAIN TEXT within your %appdata% directory
> in an
> >> XML file. This is particularly dangerous in multi-user environments with
> >> local profiles, because as we all know physical access to a computer
> means
> >> it's elementary at best to acquire information off it. Permissions only
> work
> >> if your operating system chooses to respect them, not to mention how
> simple
> >> it is *even today* to maliciously get around windows networks using
> >> pass-the-hash along with network token manipulation techniques.
> >>
> >> There has even been a bug filed that draws out great ways to
> psudo-mitigate
> >> this using built-in windows API calls, but it doesn't seem to really be
> >> going anywhere. This really concerns me because a number of my coworkers
> and
> >> friends were un-aware of this behavior, and I didn't even know about it
> >> until I'd been using it for a year or so. All I really want to see is at
> the
> >> very least just some warning that Filezilla does this.
> >>
> >> Filezilla bug report:(http://trac.filezilla-project.org/ticket/5530)
> >>
> >> My feelings have been said a lot more eloquently than I could ever hope
> to
> >> in that bug report:
> >>
> >> "Whoever keeps closing this issue and/or dismissing its importance
> >> understands neither security nor logical argument. I apologize for the
> slam,
> >> but it is undeniably true. Making the same mistake over and over does
> not
> >> make it any less of a mistake. The fact that a critical deficiency has
> >> existed for years does not make it any less critical a deficiency.
> >> Similarly, the fact that there are others (pidgin) who indulge in the
> same
> >> faulty reasoning does not make the reasoning any more sound." ~btrower
> >>
> >> While it's true you can mitigate this behavior, why should it even be
> >> enabled by default? The total lapse in security for such a feature-rich,
> >> robust piece of software is quite disturbing, and I don't understand how
> the
> >> developers don't think this is an issue.
> >>
> >> I just wanted to gauge the FD community on this issue, because with
> enough
> >> backing and explanation from the security community as to why this is a
> >> problem, this issue may finally be resolved (it's been doing this for
> years
> >> now).
> >>
> >> Regards,
> >> Ryan Sears
> >>
> >> _______________________________________________
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> >> _______________________________________________
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> >
> >
> >
> >
> >
> > _______________________________________________
> > Full-Disclosure - We believe in it.
> > Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> > Hosted and sponsored by Secunia - http://secunia.com/
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> Hosted and sponsored by Secunia - http://secunia.com/
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