this post was submitted on 27 Oct 2023
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322
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 (arstechnica.com)
submitted 1 year ago by [email protected] to c/[email protected]
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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.

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[–] [email protected] 14 points 1 year ago (1 children)

Lol, and Apple didn't even "discover" it themselves. It was 2 unaffiliated security researchers who did. Who knows if they even implemented any logic besides the UI.

[–] [email protected] 8 points 1 year ago (1 children)

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.

[–] [email protected] 1 points 1 year ago (1 children)

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.

[–] [email protected] 1 points 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.