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@ExLisper@lemmy.curiana.net

2026-10-22 07:08 UTC

One thing I don’t understand… So if a bad actor gets access to one of the intermediate CA certificates they can run all sorts of MITM attacks, right? What are the chances that government agencies don’t have a bunch of private keys from CA that are not obviously wrong? 0, right? So we should just assume that government agencies can do MITM whenever they want?

Replies (3)

  • @Blackmist@feddit.uk 2026-10-22 07:17

    Cloudflare is the largest MITM hiding in plain sight.

    Open ##5194925

  • It’s actually possible: In theory all the generated keys are added to a public certificate transparancy log. Browsers should check that the key is there (but yout http client library probably doesn’t - and this is why these compromised keys are a problem). Website owners should also check that there are no other certificates in there, and if they see an extra misissued certificate for the government spying something went really wrong at a CA and that CA would probably lose all the credibility and trust. Also when you request a certificate the CA doesn’t get your private keys, so they can’t reuse your cert. Example: ctlogs.dev/search?q=Programming.dev

    Open ##5195107

  • @marcos@lemmy.world 2026-10-22 18:19

    Yes, government agencies can do MITM whenever they want. Also, take a look at the remote management functionality of your computer.

    Open ##5202451