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j00ru's profile
j00ru//vx
j00ru//vx
j00ru//vx
@j00ru

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j00ru//vx

@j00ru

Windows hacker & vulnerability researcher. Google Project Zero. @DragonSectorCTF

Poland
j00ru.vexillium.org
Joined April 2010

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    j00ru//vx‏ @j00ru 10 Jan 2014

    FFmpeg and a tale of a thousand fixes (by @gynvael and me): see http://j00ru.vexillium.org/?p=2211  or http://gynvael.coldwind.pl/?lang=en&id=524 .

    12:17 PM - 10 Jan 2014
    • 61 Retweets
    • 41 Likes
    • AHosting.net Steve Christey Coley Luke Walker endetti Nikita Abdullin Alex Bazhaniuk Daniel Komaromy Gynvael Coldwind Nguyen Hung
    4 replies 61 retweets 41 likes
      1. New conversation
      2. Tomasz Dabrowski‏ @dabrozPL 10 Jan 2014
        Replying to @j00ru

        @j00ru @gynvael nice work! But it looks like the only reasonable way to use these libs is a bulletproof sandbox, isn't it?

        1 reply 1 retweet 1 like
      3. Gynvael Coldwind‏ @gynvael 10 Jan 2014
        Replying to @dabrozPL

        @dabrozPL @j00ru Yeah, a sandbox for complicated parsers in C/C++ is always a great idea :)

        1 reply 0 retweets 0 likes
      4. j00ru//vx‏ @j00ru 10 Jan 2014
        Replying to @gynvael

        @gynvael @dabrozPL yeah, exactly. the only sane conclusion security-wise is to sandbox those projects, as they will unlikely ever be [...]

        1 reply 0 retweets 0 likes
      5. j00ru//vx‏ @j00ru 10 Jan 2014
        Replying to @j00ru

        @gynvael @dabrozPL [...] bug-free given the codebase complexity.

        0 replies 0 retweets 0 likes
      6. End of conversation
      1. New conversation
      2.  ☣Adam‏ @AdamOfDc949 10 Jan 2014
        Replying to @j00ru

        @j00ru @gynvael Were you only considering a crash to be your success case? Or also corruption which didn't cause a crash? (& how to detect)

        1 reply 0 retweets 1 like
      3. Gynvael Coldwind‏ @gynvael 10 Jan 2014
        Replying to @AdamOfDc949

        @AdamOfDc949 @j00ru We relied on ASAN/etc (https://code.google.com/p/address-sanitizer/wiki/AddressSanitizer …) and/or signals. So this includes non-crashing memory corruption as well

        1 reply 0 retweets 1 like
      4. j00ru//vx‏ @j00ru 10 Jan 2014
        Replying to @gynvael

        @gynvael @AdamOfDc949 the "etc" being mostly MemorySanitizer, which we used for detection of uninitialized memory usage.

        1 reply 0 retweets 0 likes
      5.  ☣Adam‏ @AdamOfDc949 15 Jan 2014
        Replying to @j00ru

        @j00ru @gynvael ASAN only works when you have source code though, right? I guess that just means good news for open source software.

        1 reply 0 retweets 0 likes
      6. j00ru//vx‏ @j00ru 15 Jan 2014
        Replying to @AdamOfDc949

        @AdamOfDc949 @gynvael Yes, ASan only works with source code.

        0 replies 0 retweets 0 likes
      7. End of conversation
      1. New conversation
      2. Steve Christey Coley‏ @SushiDude 10 Jan 2014
        Replying to @j00ru

        an excellent and educational body of work with ffmpeg, @j00ru and @gynvael - nice to read some of the context behind it.

        1 reply 0 retweets 2 likes
      3. Marc Ruef‏Verified account @mruef 10 Jan 2014
        Replying to @SushiDude

        @SushiDude @j00ru @gynvael I always thought they just want to troll our @scipvulbot mods with so many findings ;)

        0 replies 0 retweets 1 like
      4. End of conversation
      1. Haifei Li‏ @HaifeiLi 10 Jan 2014
        Replying to @j00ru

        @j00ru @gynvael wow, just wow!

        0 replies 0 retweets 0 likes
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