iPhones have been exposing your unique MAC despite Apple’s promises otherwise
arstechnica.com
“From the get-go, this feature was useless,” researcher says of feature put into iOS 14.

iPhones have been exposing your unique MAC despite Apple’s promises otherwise — “From the get-go, this feature was useless,” researcher says of feature put into iOS 14::“From the get-go, this feature was useless,” researcher says of feature put into iOS 14.

  • poopkins@lemmy.worldEnglish
    7·
    1 year ago

    If you had read the article, you would have known that the bug relates to a very specific field inside a multicast payload and a network-specific unique MAC address is generated and retained as advertised. I’m not defending Apple; just reiterating the facts.

    • eskimofry@lemmy.worldEnglish
      11·
      1 year ago

      The way multicast works is that the destination mac address starts with 01 00 5e and then next 3 octets (mac addresses are 6 octets long) are copied from the IP address lower octets. The mac address is always this when building the L2 headers for the packet.

      • poopkins@lemmy.worldEnglish
        1·
        1 year ago

        It’s not specified what precisely is provided in the payload of the multicast body. I suspect that the original MAC address is included in something like a Bonjour broadcast, but I wasn’t able to find any documentation that confirms that.