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dguido's profile
Dan Guido
Dan Guido
Dan Guido
@dguido

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Dan Guido

@dguido

CEO @trailofbits, organizer @EmpireHacking, director @hack_secure. Open DMs.

Brooklyn, NY
trailofbits.com
Joined April 2008

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    1. Ryan Duff‏ @flyryan 20 Jul 2016

      Pretty sick... potential for exploitation through iMessage/SMS! - Apple Remote Code Execution With Image Files http://blog.talosintel.com/2016/07/apple-image-rce.html …

      1 reply 24 retweets 27 likes
      Dan Guido‏ @dguido 20 Jul 2016
      Replying to @flyryan @daveaitel

      I wrote up my high level impressions of this bug for iOS. tl;dr under-whelmed over-hypedhttps://www.reddit.com/r/netsec/comments/4tnoxr/apple_imageio_bug_allows_remote_code_exec_buffer/d5ir2mt …

      12:51 PM - 20 Jul 2016
      • 16 Retweets
      • 24 Likes
      • Tomy Lamote Will Strafach Jaybee Nick @blaufish_ SystemsSecurityLab Sn!per 🌐 Elay Gueta kb
      3 replies 16 retweets 24 likes
        1. New conversation
        2. qwertyoruiop‏ @qwertyoruiopz 21 Jul 2016
          Replying to @dguido

          @antisnatchor @flyryan @daveaitel note that commcenter no longers run as root but as '_wireless'

          2 replies 2 retweets 4 likes
        3. Dan Guido‏ @dguido 21 Jul 2016
          Replying to @qwertyoruiopz

          Thanks! It's been a long time since anyone I know has looked at CommCenter.

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. New conversation
        2. Lich in Seattle‏ @richinseattle 21 Jul 2016
          Replying to @dguido @flyryan @daveaitel

          We do have a safari exploit, iMessage vector is there but no public infoleak technique. no keychain, browser mem

          1 reply 5 retweets 4 likes
        3. antisnatchor‏ @antisnatchor 21 Jul 2016
          Replying to @richinseattle @dguido and

          even what is 'public' from the StageF stuff is still via browser.No public PoCs ever via chat/SMS

          0 replies 1 retweet 2 likes
        4. End of conversation
        1. New conversation
        2. CopperheadOS‏ @CopperheadOS 21 Jul 2016
          Replying to @dguido @flyryan @daveaitel

          'Stagefright could target code that wasn't protected by ASLR' - not really. The ASLR is just not very good.

          1 reply 0 retweets 4 likes
        3. CopperheadOS‏ @CopperheadOS 21 Jul 2016
          Replying to @CopperheadOS @dguido and

          'there is no code signing on Android' - there's verified boot. Apps have signatures but it's a different system.

          1 reply 0 retweets 2 likes
        4. CopperheadOS‏ @CopperheadOS 21 Jul 2016
          Replying to @CopperheadOS @dguido and

          'an exploit can use access to the shell in their payload' - for processes where that's allowed by SELinux policy

          1 reply 0 retweets 0 likes
        5. CopperheadOS‏ @CopperheadOS 21 Jul 2016
          Replying to @CopperheadOS @dguido and

          Is that the case for mediaserver? It doesn't have access to toolbox_exec or shell_exec. Doesn't seem like it.

          2 replies 0 retweets 0 likes
        6. CopperheadOS‏ @CopperheadOS 21 Jul 2016
          Replying to @CopperheadOS @dguido and

          And what does 'is significantly more constrained' mean? It would make sense if you compared to the past state.

          1 reply 0 retweets 0 likes
        7. CopperheadOS‏ @CopperheadOS 21 Jul 2016
          Replying to @CopperheadOS @dguido and

          And ASLR isn't only weak on Android. Windows (not specifically mobile) and iOS have their awful ASLR weaknesses.

          1 reply 4 retweets 1 like
        8. CopperheadOS‏ @CopperheadOS 21 Jul 2016
          Replying to @CopperheadOS @dguido and

          Can bypass even a strong ASLR implementation. Google made it sound like it was a major barrier for mediaserver.

          1 reply 0 retweets 0 likes
        9. CopperheadOS‏ @CopperheadOS 21 Jul 2016
          Replying to @CopperheadOS @dguido and

          Sad part is that barely having any more of these media exploits is straightforward: use memory safe languages.

          3 replies 3 retweets 0 likes
        10. 1 more reply

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