full-disclosure - Trojan Horse for Mac OS X

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Message-ID: <200404092334.i39NYO816213@netsys.com>
From: larry at larryseltzer.com (Larry Seltzer)
Subject: Trojan Horse for Mac OS X

>>Actually this is not correct. By default they will deny you the ability to save or
open the attachments, but they do not strip anything. 

Same difference, and in any event Outlook/OE sounds nothing like Mail.app, but very much
like what the person you corrected said.

>>My experience is that users almost always turn off that feature so they can save those
questionable file types again. 

I hear a lot of people say this in order to diminish the feature, but I don't think it's
true at all. The vast majority of people don't even know they're missing anything, and
that's just as well.

>>The feature on or off will still leave the attachments on the emails.

Inaccessible by the user

Larry Seltzer
eWEEK.com Security Center Editor
http://security.eweek.com/
http://blog.ziffdavis.com/seltzer
larryseltzer@...fdavis.com 
-----Original Message-----
From: full-disclosure-admin@...ts.netsys.com
[mailto:full-disclosure-admin@...ts.netsys.com] On Behalf Of Joshua Levitsky
Sent: Friday, April 09, 2004 7:02 PM
To: Larry Seltzer
Cc: 'Thomas Vincent'; 'Full-Disclosure'
Subject: Re: [Full-Disclosure] Trojan Horse for Mac OS X

On Apr 9, 2004, at 6:53 PM, Larry Seltzer wrote:

>>> This technique wouldn't work now because Mail.app, and probably all 
>>> modern mail client. Will not let you execute code from within the 
>>> mail client.
>
>> Completely untrue. Mail.app will ask you if you want to open the app 
>> just like Outlook
> Express on Windows does.
>
> Actually, Outlook Express and Outlook will (by default) strip all 
> executable attachments before you even get them. They've done this for 
> some time.
>

Actually this is not correct. By default they will deny you the ability to save or open
the attachments, but they do not strip anything. My experience is that users almost
always turn off that feature so they can save those questionable file types again. The
feature on or off will still leave the attachments on the emails.

-Josh

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