Google Spoofed Via DKIM Replay Attack: A Technical Breakdown
easydmarc.com
Learn how a Google spoof used a DKIM replay attack to bypass email security and trick users with a fake subpoena in this real-world phishing case.
  • A_norny_mousse@feddit.orgEnglish
    6·
    12 days ago

    I stopped reading when I realised the publisher is a company that sells a product that fixes the supposed problem.

    Maybe this is a thing, maybe it isn’t, but I don’t have the resources to go on reading and analyze it.

  • girsaysdoom@sh.itjust.worksEnglish
    1·
    11 days ago

    Even if they could reuse a DKIM hash on an email (pretty sure this is unique per email and would fail on a legitimate check), SPF would show its obviously not from Google. So just make sure your email server correctly handles DKIM verification and blocks SPF hard fails, and you’re probably good against this.

    • MysteriousSophon21@lemmy.worldEnglish
      2·
      9 days ago

      SPF won’t help here because the attack specifically uses legitimate sending infrastructure - they’re forwarding through a compromised Google Workspace account so the SPF check passes, while reusing a valid DKIM signature from a diferent message.