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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 Jan 3
      • Report Tweet
      • Report NetzDG Violation

      I'm looking at @zulip as a possible option for the Asahi Linux chat, but I've already run into something concerning... It seems they trust verified e-mails from all of their authentication providers (GitHub / Gitlab / Google). This means their attack surface is *all* of those.

      9 replies 1 retweet 35 likes
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    2. Hector Martin‏ @marcan42 Jan 3
      • Report Tweet
      • Report NetzDG Violation

      So even if you've never logged into @zulip with @gitlab, if you have a Gitlab account and someone takes over it, they can take over your Zulip. If you don't have a Gitlab account and someone creates one and manages to verify your email on it, they can take over your Zulip.

      1 reply 0 retweets 14 likes
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    3. Hector Martin‏ @marcan42 Jan 3
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      • Report NetzDG Violation

      This seems... suboptimal. Third party log-ins should be linked explicitly, not implicitly via verified e-mails. I was confused, looking for that option in the settings and not finding it... then realized it was automagic via email matching.

      2 replies 0 retweets 16 likes
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    4. Hector Martin‏ @marcan42 Jan 3
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      • Report NetzDG Violation

      Something something email canonicalization. Here be dragons.

      2 replies 0 retweets 18 likes
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    5. Kevin Riggle‏ @kevinriggle Jan 3
      • Report Tweet
      • Report NetzDG Violation
      Replying to @marcan42

      What’s your threat model? An adversary takes over an account, now what bad can they do?

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 Jan 3
      • Report Tweet
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      Replying to @kevinriggle

      That, or someone somewhere has a different idea than you about email canonicalization. Or a service gets compromised and that now affects people who aren't users. Like, if Gitlab gets owned the attacker can take over *all* @zulip accounts, not just those of Gitlab users.

      3:42 AM - 3 Jan 2021
      • 1 Retweet
      • 2 Likes
      • Kevin Riggle Mark Eichin
      0 replies 1 retweet 2 likes

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