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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 11 May 2020
      • Report Tweet
      • Report NetzDG Violation

      Hector Martin Retweeted WIRED

      If you open your computer's case, it is already vulnerable to hacking, because no consumer x86 computer is secure under that threat model. Yes, this is another bullshit hyped attack with minimal practical consequence because under their threat model you are already pwned.https://twitter.com/WIRED/status/1259669698494509056 …

      Hector Martin added,

      WIREDVerified account @WIRED
      A newly-found vulnerability in thunderbolt ports could leave any PC built before 2019 open to hacking—even if the machine is asleep or locked. https://wired.trib.al/OEOsP3W 
      20 replies 146 retweets 483 likes
      Show this thread
    2. Matt Sieker‏ @matt_sieker 11 May 2020
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      Replying to @marcan42

      I do wish there was something you could do. I'm working on a project that involves shipping a server-as-an-appliance to a not very US contract/ip law favorable country. The best I could manage was tying the disk encryption to the TPM with a half dozen PCRs.

      1 reply 0 retweets 0 likes
    3. Matt Sieker‏ @matt_sieker 11 May 2020
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      Replying to @matt_sieker @marcan42

      I fully warned my client up front this would just stop "casual" attacks. I have no clue if you can read they key off the bus during TPM unlocking. And I'm sure it's in ram somewhere that you could grab with a fast enough scope.

      2 replies 0 retweets 0 likes
    4. Hector Martin‏ @marcan42 11 May 2020
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      Replying to @matt_sieker

      You can. I've implemented that attack. The only way that works is physical security, i.e. a mesh and antitampering, and fast reaction to intrusions (e.g. wiping keys permanently, held in SRAM).

      1 reply 0 retweets 0 likes
    5. Matt Sieker‏ @matt_sieker 11 May 2020
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      Replying to @marcan42

      I know the chassis has an intrusion switch, but I couldn't make heads or tails if it actually affected any PCRs before the drop dead date to ship hardware. Plus the attackers could be state-level, which I flat out stated "people smarter than me can't manage to defend against that

      2 replies 0 retweets 1 like
      Hector Martin‏ @marcan42 11 May 2020
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      Replying to @matt_sieker

      Yeah, you're basically SOL at that point without a massively hardened device.

      9:37 AM - 11 May 2020
      • 1 Like
      • Graham Sutherland (Polynomial^DSS)
      0 replies 0 retweets 1 like

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