iOS 14 beta Private Wi-Fi address leaks the real mac address on the local network.

Question

Created Aug ’20

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iOS 14 beta private Wi-Fi address leaks the real mac address on the local network. Probably during dhcp lease acquisition.

This show up on a Cisco Meraki network as a IP conflict. It makes the Meraki think one IP is going to two different mac addresses. And sends a report to the administrator which includes both mac addresses.

Privacy leak for the user, and annoyance to Network Admins.

It seems that the device should connect with the privatized mac address from the beginning. Not starting with the real mac address and then switching to the private mac address.

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Answer 1

jwoif8374 OP

Aug ’20

This was observed on a
iPhone Xs Max
iOS 14 beta 3 (18A5332f)

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Answer 2

abadr OP

Sep ’20

I just experienced the consequences of this - blocked by Meraki on a hotel WiFi network. Had to turn off private MAC to bypass the block. iPhone 11 Pro Max on 14.0 (18A5357e)

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Answer 3

mplewis2 OP

Sep ’20

And of course this issue made it into the actual release....anyone have an update or workaround other than just disabling private?

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