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whitequark's profile
whitequark
whitequark
whitequark
@whitequark

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whitequark

@whitequark

http://whitequark.org  · http://llvm.moe  · http://powerlinesinanime.tumblr.com  · working on quantum computers for a living · DMs open · she

Joined July 2010

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    1. whitequark‏ @whitequark Sep 21

      OH: "this research team managed to get arbitrary code exec on an hp all-in-one print/scan/fax machine by sending a fax to it through a jpeg with an oversized DCT(?) table"

      2 replies 17 retweets 75 likes
      Show this thread
      whitequark‏ @whitequark Sep 21

      "yeah, you can update the firmware. they talked about that too. it comes in a PCL file and you print it"

      6:05 PM - 21 Sep 2018
      • 5 Retweets
      • 64 Likes
      • Delan Azabani Alexander Riccio ⟨𝜑∣𝜙⟩ 🦞 Lauren (🦇) Cardinal Sine 🎃 Graham Spookyland 🎃 [Polynomial^DSS] McCloud Peter Barfuss 𒀱 Daniel 💭 🌹 🚀
      6 replies 5 retweets 64 likes
        1. New conversation
        2. Alexis Beingessner‏ @Gankro Sep 21
          Replying to @whitequark

          there's something really elegant about "printing" updates as long as you don't think about it

          1 reply 0 retweets 6 likes
        3. whitequark‏ @whitequark Sep 21
          Replying to @Gankro

          no there isn't, in-band signaling must die

          0 replies 1 retweet 11 likes
        4. End of conversation
        1. New conversation
        2. Spooky Dave’s Halloween Name‏ @6502_ftw Sep 21
          Replying to @whitequark

          I’d criticize this, but I once came up with a scheme to update TV firmware via special video frames, so.

          1 reply 0 retweets 6 likes
        3. whitequark‏ @whitequark Sep 21
          Replying to @6502_ftw

          no

          1 reply 0 retweets 0 likes
        4. Spooky Dave’s Halloween Name‏ @6502_ftw Sep 21
          Replying to @whitequark

          I mean, it required a challenge/response plus an RSA/ECC signature from upstream, so it’s not like you could just play a special video file. I do my homework. In any case, it was because updating over I2C would have been nightmarishly slow.

          0 replies 0 retweets 4 likes
        5. End of conversation
        1. New conversation
        2. J.R. Raith‏ @jrronimo Sep 21
          Replying to @whitequark

          Can confirm. I have 'printed' firmware updates before.

          1 reply 0 retweets 1 like
        3. whitequark‏ @whitequark Sep 21
          Replying to @jrronimo

          cursed device

          1 reply 0 retweets 2 likes
        4. J.R. Raith‏ @jrronimo Sep 21
          Replying to @whitequark

          Yes. Yes it very much was.

          0 replies 0 retweets 0 likes
        5. End of conversation
        1. New conversation
        2.  🎃 Graham Spookyland  🎃 [Polynomial^DSS]‏ @gsuberland Sep 22
          Replying to @whitequark

          wat

          1 reply 0 retweets 0 likes
        3. whitequark‏ @whitequark Sep 22
          Replying to @gsuberland

          exactly what the words say. I understand that it might be hard to parse but it is true

          1 reply 0 retweets 0 likes
        4.  🎃 Graham Spookyland  🎃 [Polynomial^DSS]‏ @gsuberland Sep 22
          Replying to @whitequark

          I mean it kiiiiinnnnda makes sense considering it's an exposed protocol already and saves complexity, but also wtf.

          0 replies 0 retweets 0 likes
        5. End of conversation
        1. Tomek Dubrownik‏ @tdubrownik Sep 21
          Replying to @whitequark

          Mmmm, reminds me of https://media.ccc.de/v/28c3-4780-en-print_me_if_you_dare … , pretty great talk on almost exactly that from 2011.

          0 replies 0 retweets 2 likes
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        1. Brokenwing‏ @Brokenwingx9 Sep 21
          Replying to @whitequark

          Honestly, given that printers have code to check they’re not printing money, it’s only a shock it took this long.

          0 replies 0 retweets 1 like
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