Dailydave mailing list archives
Re: Vista speach recognition
From: "George Ou" <george_ou () lanarchitect net>
Date: Tue, 30 Jan 2007 20:51:49 -0800
I ran some more tests and here is a very realistic scenario. 1. Website says "start listening" to toggle an idle speech system in Vista to listening mode. 2. Website says "start", "windows explorer" 3. Website says "downloads", "documents", 3, OK, to toggle to downloads then back to documents and highlights the documents folder. 4. Website says "delete", "yes". 5. Website says "show desktop", "recycle bin", "empty", "yes". I tested this scenario and it works. Yes you need to actually catch the user off-guard and they would have had to turn on speech recognition at some point which then autoloads speech in Vista from that point on. This does not require user interaction other than clicking on a URL to visit a website and this does not trigger UAC security warnings. Websites routinely run audio without requiring user interaction, just check out all those anoying MySpace websites. It just zaps any folder the website wants to zap. What surprised me was that the audio playback level did not need to be that high and it was able to wake a sleeping speech command system. I believe it's also possible to start IE7 and download a custom payload, then be able to run that payload without triggering UAC and the payload could encrypt user files for ransom without triggering UAC. Then it's possible to open notepad and type in a message stating "I want $xxxx sent here if you ever want to see your files in clear text again". All this without triggering UAC or Secure Desktop in Vista. Note that I have not tested this scenario. George _____ From: Rich Mogull [mailto:rmogull-dd () securosis com] Sent: Tuesday, January 30, 2007 5:06 PM To: George Ou Cc: 'Dave Aitel'; dailydave () lists immunitysec com Subject: Re: [Dailydave] Vista speach recognition I just tested this on Vista and it works. Running Vista Ultimate in Parallels on my Mac I enabled voice commands, then recorded a simple command and played it back. Using the mic and speakers on my Mac the commands executed. Sound quality was actually terrible because of poor Vista performance in the VM. But UAC seems to stop it. At the suggestion of Dave Maynor I tried to create a new user account. The usual UAC window popped up and no voice commands seemed to work. I suspect anything that avoids the "final" (greyed out background) UAC dialogs will work, but looks like UAC stops it. At least in my quick test... -rich On Jan 30, 2007, at 2:27 PM, George Ou wrote: Voice command is autoloaded if you calibrate the system and enable Voice commands. You can actually activate voice command mode by saying a certain phrase. If this exploit works, you could say that phrase first and then start your commands. Then you'd say "start", "cmd", "enter", then bark out the commands you want. This assumes it works and that no one near the PC gets suspicious :). George _____ From: dailydave-bounces () lists immunitysec com [mailto:dailydave-bounces () lists immunitysec com] On Behalf Of Dave Aitel Sent: Tuesday, January 30, 2007 12:48 PM To: dailydave () lists immunitysec com Subject: Re: [Dailydave] Vista speach recognition That's a great idea! If the Microsoft people have thought of it, no doubt they ignore any sound coming out of the speakers, so you'll have to rely on an echo effect. Essentially you can always win if your model of the acoustic properties of the room is better than Vistas. :> Many speech recognition systems I've seen require the user to press a button first, of course. :> I haven't tested Vista's. I have, however, gotten CANVAS working on Vista. ( http://www.immunityinc.com/images/CANVAS_on_Vista.png). So far I recommend it over Windows XP SP2 because I think they removed that broken limitation from the TCP stack where you could only make 5 connections at once. Also, here is an article about Evgeny! ok. Not entirely about Evgeny. Mostly about people buying bugs. For someone who's wife is a lawyer in this field, there's a lot of "apparently legal" talk in it. It's just plain legal! Everybody deal. http://www.nytimes.com/2007/01/30/technology/30bugs.html?pagewanted=1 <http://www.nytimes.com/2007/01/30/technology/30bugs.html?pagewanted=1&_r=1> &_r=1 -dave On 1/30/07, Sebastian Krahmer <krahmer () suse de <mailto:krahmer () suse de> > wrote: Hi, I am in no way an Win expert but recently I read that vista will support commands as they are spoken by the user. What about websites where the browser is playing wav or similar audio files upon visiting? what if they contain spoken commands? An exploit audio file which speaks something like 'open shell' would be cool, eh? Sebastian -- ~ ~ perl self.pl ~ $_='print"\$_=\47$_\47;eval"';eval ~ krahmer () suse de - SuSE Security Team ~ _______________________________________________ Dailydave mailing list Dailydave () lists immunitysec com http://lists.immunitysec.com/mailman/listinfo/dailydave _______________________________________________ Dailydave mailing list Dailydave () lists immunitysec com http://lists.immunitysec.com/mailman/listinfo/dailydave
_______________________________________________ Dailydave mailing list Dailydave () lists immunitysec com http://lists.immunitysec.com/mailman/listinfo/dailydave
Current thread:
- Re: Vista speach recognition, (continued)
- Re: Vista speach recognition dan (Jan 31)
- Re: Vista speach recognition Curt Wilson (Jan 31)
- Re: Vista speach recognition dan (Jan 31)
- Message not available
- Message not available
- Message not available
- Message not available
- Re: Vista speach recognition George Ou (Jan 31)
- Message not available
- Message not available
- Message not available
- Message not available
- Re: Vista speach recognition George Ou (Jan 31)
- Message not available
- Re: Vista speach recognition George Ou (Feb 01)
- Re: Vista speach recognition Sebastian Krahmer (Feb 01)
- Message not available
- Re: Vista speach recognition George Ou (Feb 02)
- Re: Vista speach recognition Sebastian Krahmer (Feb 02)
- Re: Vista speach recognition Dave Aitel (Feb 02)
- Re: Vista speach recognition George Ou (Jan 31)
- Re: Vista speach recognition dan (Jan 30)
- Re: Vista speach recognition Sebastian Krahmer (Jan 31)
- Re: Vista speach recognition George Ou (Jan 31)
- Re: Vista speach recognition Michal Zalewski (Feb 01)