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Re: Filezilla's silent caching of user's credentials
From: Brandon McGinty <brandon.mcginty () gmail com>
Date: Sat, 09 Oct 2010 16:03:55 -0400

If this is the wrong list for this question, I appologize.
Is there any precedent for notifying those whose results have popped up
for the below referenced google search?
I would be happy to send out an email to the domain owners?, to alert
them of a problem, but I am not sure if this is recommended.

Brandon McGinty


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 () tcs 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 () mtu edu>
To:
full-disclosure <full-disclosure () lists 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 () lists 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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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/

_______________________________________________
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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